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HTML 

              
                <script src="https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.mjs" type="module"></script>
<div class="p-storybook__wrapper">
        <div class="p-storybook__page">
            <div class="p-page__1">
                <div class="sky">
                    <div class="star"></div>
                    <div class="star"></div>
                    <div class="star"></div>
                    <div class="star"></div>
                    <div class="star"></div>
                </div>
                <h1>私のお気に入りの絵本</h1>
                <span>My favorite story book</span>
            </div>
            <div class="page-trigger">
            </div>
            <div class="anime-trigger">
            </div>
        </div>
        <div class="p-storybook__page">
            <div class="p-page p-page__2">
                <div class="p-page__bg">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page1/%E8%83%8C%E6%99%AF.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page1/%E4%BA%BA%E7%89%A9.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page1/%E6%9C%A8%EF%BC%91.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree2">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page1/%E6%9C%A8%E3%81%A8%E8%8D%89.png?raw=true" alt="">
                </div>
                <div class="p-page__title js-title-1">
                </div>
            </div>
            <div class="p-storybook__page-text">
                <p>仲睦まじい兄妹ヘンゼルとグレーテルが、継母に森に捨てられ、魔女の住むお菓子の家に迷い込む物語。</p>
            </div>
            <div class="page-trigger">
            </div>
            <div class="anime-trigger">
            </div>
        </div>
        <div class="p-storybook__page">
            <div class="p-page p-page__3">
                <div class="p-page__bg">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E8%83%8C%E6%99%AF.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="./src/assets/image/page2/桃太郎.png" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E6%A1%83%E5%A4%AA%E9%83%8E.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E7%8A%AC.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E7%8C%BF.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E8%8D%89.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree2">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page2/%E8%8D%89%EF%BC%92.png?raw=true" alt="">
                </div>
                <div class="p-page__title js-title-2">
                </div>
            </div>
            <div class="p-storybook__page-text">
                <p>桃から生まれた男の子、「桃太郎」が仲間を引き連れて、鬼を討伐する物語。</p>
            </div>
            <div class="page-trigger">
            </div>
            <div class="anime-trigger">
            </div>
        </div>
        <div class="p-storybook__page">
            <div class="p-page p-page__4">
                <div class="p-page__bg">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page3/%E8%83%8C%E6%99%AF.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-people">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page3/%E3%82%B8%E3%83%A3%E3%83%83%E3%82%AF.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page3/%E8%94%A6.png?raw=true" alt="">
                </div>
                <div class="p-page__object p-page__2-tree2">
                    <img src="https://github.com/hayuse-mochiya/code_pen_challenge/blob/feature/scroll/codepen/src/assets/image/page3/%E8%94%A6%EF%BC%92.png?raw=true" alt="">
                </div>
                <div class="p-page__title js-title-3">
                </div>
            </div>
            <div class="p-storybook__page-text">
                <p>ジャックが不思議な豆を手に入れて、空の上を探検する物語。</p>
            </div>
            <div class="page-trigger">
            </div>
            <div class="anime-trigger">
            </div>
        </div>
    </div>
!

CSS 

              
                body, html {
    margin: 0;
    padding: 0;
    // overflow-x: hidden;
    height: 100%;
    // scroll-behavior: smooth;
    background-color: #110f5d;
}
* {
    box-sizing: border-box;
}
.p-page {
    width: 100vw;
    height: 100vh;
    transform-style: preserve-3d;
    animation: rotate 30s infinite;
    flex-shrink: 0;
    position: relative;
    &__title {
        position: absolute;
        top: 25%;
        left: 50%;
        translate: -50% -50%;
        transform: translate3d(0, 0, 600px);
        opacity: 0.8;
        display: none;
    }
    &__bg {
        position: absolute;
        top: 0;
        left: 0;
        object-fit: cover;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        &::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: #110f5d;
            border-radius: 50%;
            transform-origin: center center;
            transition: scale 1s;
            scale: 300%;
            filter: blur(100px);
        }
    }
    &__object {
        position: absolute;
        top: 0;
        left: 0;
        opacity: 0;
        scale: 150%;
        transform: translate3d(0, 0, -500px);
        object-fit: cover;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        & > img {
        }
    }
    &__1 {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        background-color: #110f5d;
        flex-direction: column;
        & > h1 {
            font-size: 4rem;
            color: #fff;
            display: block;
            margin: 0;
            padding: 0;
        }
        & > span {
            display: block;
            color: #fff;
            font-size: 1.5rem;
        }
    }
    &__2 {
        & > dotlottie-player {
            // position: absolute;
            // top: 25%;
            // left: 50%;
            // translate: -50% -50%;
            // transform: translate3d(0, 0, 600px);
            // opacity: 0.8;
            // display: none;
        }
        &-people {
            transition: 1s 0.3s;
            opacity: 0;
            scale: 150%;
            transform: translate3d(0, 0, 2000px);
        }
        &-tree {
            transition: 1s 0.5s;
            opacity: 0;
            scale: 150%;
            transform: translate3d(0, 0, 2000px);
        }
        &-tree2 {
            transition: 1s 0.7s;
            opacity: 0;
            scale: 150%;
            transform: translate3d(0, 0, 2000px);
        }
    }
    &__3 {
        .p-page__title {
            left: 0;
            top: 5%;
            translate: 0 0;
            opacity: 1;
        }
    }
    &__4 {
        .p-page__title {
            opacity: 1;
            // mix-blend-mode: color-burn;
        }
    }
}

.p-storybook {
    $this: &;
    &__page {
        position: relative;
        width: 100vw;
        height: 100vh;
        // float: left;
        flex-shrink: 0;
        overflow: hidden;
        & > div {
            // width: 100%;
            // height: 100%;
            &:is(.page-trigger) {
                position: absolute;
                top: 50%;
                left: 30%;
                width: 10px;
                height: 10px;
                // background-color: #f00;
            }
            &:is(.anime-trigger) {
                position: absolute;
                top: 50%;
                right: 10%;
                width: 10px;
                height: 10px;
                // background-color: #f00;
            }
        }
        &-text {
            position: absolute;
            padding: 16px 16px;
            width: 100%;
            height: max-content !important;
            font-size: 1.7rem;
            color: white;
            bottom: 32px;
            opacity: 0;
            text-shadow: 1px 1px 10px #000;
            backdrop-filter: blur(0px);
            transition: backdrop-filter 3s;
            & > p {
                text-align: center;
                padding: 0;
                margin: 0;
            }
        }
        &:is(.anime-start) {
            .p-storybook__page-text {
                opacity: 1;
                backdrop-filter: blur(3px);
                span {
                    opacity: 0;
                    animation: fade-in 1s forwards;
                }
            }
            .p-page__object {
                // animation: 1s fadein forwards;
            }
            .p-page {
                &__bg {
                    &::after {
                        scale: 0%;
                    }
                }
                &__2 {
                    &-people {
                        // animation:1s 0.2s fadein forwards;
                        opacity: 1;
                        scale: 100%;
                        transform: translate3d(0, 0, 100px);
                    }
                    &-tree {
                        opacity: 1;
                        scale: 100%;
                        transform: translate3d(0, 0, 1000px);
                    }
                    &-tree2 {
                        opacity: 1;
                        scale: 100%;
                        transform: translate3d(0, 0, 500px);
                    }
                    & > dotlottie-player {
                    }
                }
                &__title {
                    display: block;
                }
            }

        }
    }
    &__wrapper {
        display: flex;
    }
}

.sky {
    position: absolute;
    width: 100%;
    height: 100%;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background-color: white;
    border-radius: 50%;
    opacity: 0;
    animation: twinkle 5s infinite ease-in-out;
}

.star:nth-child(1) { top: 20%; left: 15%; }
.star:nth-child(2) { top: 40%; left: 30%; }
.star:nth-child(3) { top: 60%; left: 70%; }
.star:nth-child(4) { top: 80%; left: 50%; }
.star:nth-child(5) { top: 50%; left: 80%; }
/* Add more star positions as needed */

@keyframes twinkle {
    0%, 100% { opacity: 0; }
    50% { opacity: 1; }
}


@keyframes fade-in {
    to {
        opacity: 1;
    }
}


@keyframes rotate {
    0% {transform: rotateX(0deg) rotateY(0deg)}
    25% {transform: rotateX(0deg) rotateY(5deg)}
    75% {transform: rotateX(0deg) rotateY(-5deg)}
    100% {transform: rotateX(0deg) rotateY(0deg)}
  }

@keyframes fadein {
    0% {
        opacity: 0;
        scale: 150%;
        transform: translate3d(0, 0, -500px);
    }
    100% {
        opacity: 1;
        scale: 100%;
        transform: translate3d(0, 0, 0px);
    }
}
!

JS 

              
                console.log("storybook");

let currentSection = 0;
let scrollPosition = 0;

let timeoutId: number | null = null;
const delay = 500; // 3秒

const titleData = [
    {
       class: 'js-title-1',
       logo: 'https://lottie.host/fe19e5b1-96f6-4ff1-a74a-6d96ded01bde/FYZjndTMH6.json'
    },
    {
        class: 'js-title-2',
        logo: 'https://lottie.host/b05dcea8-b4c2-4b91-9de5-3d903c07940a/kepiEk8xzj.json' ,
    },
    {
        class: 'js-title-3',
        logo: 'https://lottie.host/265f5cd6-0d0c-42b3-9ae6-a6919eeb9297/GslZuGRsk7.json' ,
    }
]

const logoDataFunc = () => {
    titleData.forEach((title) => {
        console.log(title.logo);
        const logoElm = document.querySelector(`.${title.class}`);
        const player = document.createElement("dotlottie-player");
        player.setAttribute('src', title.logo);
        player.setAttribute('background', 'transparent');
        player.setAttribute('speed', '1');
        player.setAttribute('autoplay', '');
        if (logoElm === null) return;
        logoElm.innerHTML = '';
        logoElm.appendChild(player);
    });
}


const sections: NodeListOf<HTMLElement> = document.querySelectorAll('.p-storybook__page');

const handleWheelEvent = (event: WheelEvent): void => {
    event.preventDefault(); // Prevent default scroll behavior
    // if (event.deltaY > 0) {
    //     console.log(event.deltaY);
    //     currentSection = Math.min(currentSection + 1, sections.length - 1);
    // } else {
    //     currentSection = Math.max(currentSection - 1, 0);
    // }
    // window.scrollTo
    // console.log(event.deltaY, '|||||', currentSection);
    currentSection += event.deltaY;
    if (currentSection < 0) currentSection = 0;
    if (currentSection > 4500) currentSection = 4500;
    // if (currentSection > 0) currentSection = 0;

    window.scrollTo({ left: currentSection });
    // currentSection = currentSection + event.deltaY;

};

const movePage = () => {
    const activePage = document.querySelector<HTMLElement>('.p-storybook__page.is-active');
    if (activePage === null) return;
    scrollPosition = activePage.offsetLeft;

    window.scrollTo({ left: scrollPosition, behavior: "smooth" });

    // currentSection = scrollPosition;
}
const onScrollEnd = () => {
    currentSection = scrollPosition;
  };
  
const scrollHandler = () => {
if (timeoutId !== null) {
    clearTimeout(timeoutId);
}
timeoutId = window.setTimeout(onScrollEnd, delay);
};
  
  
  
window.addEventListener('wheel', handleWheelEvent, { passive: false });
window.addEventListener('scroll', scrollHandler);
window.addEventListener('touchend', movePage);
window.addEventListener('scrollend', movePage);

const scrollIntersect = (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            entry.target.parentElement?.classList.add('is-active');
        } else {
            entry.target.parentElement?.classList.remove('is-active');
        }
    });
};

const animeIntersect = (entries: IntersectionObserverEntry[], observer: IntersectionObserver): void => {
    entries.forEach(entry => {
        if (entry.isIntersecting) {
            logoDataFunc();
            entry.target.parentElement?.classList.add('anime-start');
            const textElement = document.querySelector('.anime-start .p-storybook__page-text p');
            if (textElement) {
                const text = textElement.textContent || '';
                textElement.textContent = '';

                text.split('').forEach((char, index) => {
                    const span = document.createElement('span');
                    span.textContent = char;
                    span.style.animationDelay = `${index * 0.1}s`;
                    textElement.appendChild(span);
                });
            }
        } else {
            entry.target.parentElement?.classList.remove('anime-start');
        }
    });
};

// Options for the IntersectionObserver
const options = {
    root: null,
    rootMargin: '0px',
    threshold: 0.1
};

// Create the IntersectionObserver
const scrollObserver = new IntersectionObserver(scrollIntersect, options);

// Observe each .page-trigger element
const pageTriggers = document.querySelectorAll('.page-trigger');
pageTriggers.forEach(trigger => scrollObserver.observe(trigger));

// Create the IntersectionObserver
const animeObserver = new IntersectionObserver(animeIntersect, options);

// Observe each .page-trigger element
const animeTriggers = document.querySelectorAll('.anime-trigger');
animeTriggers.forEach(trigger => animeObserver.observe(trigger));
!
999px

Console