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HTML

              
                <!-- idea from http://part.archi -->
<section class="top">
  <div class="content">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <img src="https://images.unsplash.com/photo-1519406155028-39dbcdf8400c?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
  </div>
</section>
<section class="back">
  <div class="content">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <img src="https://images.unsplash.com/photo-1519406155028-39dbcdf8400c?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
  </div>
</section>
<section class="bottom">
  <div class="content">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <img src="https://images.unsplash.com/photo-1519406155028-39dbcdf8400c?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ" alt="">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Deleniti consequuntur aut nihil exercitationem earum itaque tenetur asperiores vel odio eveniet, nisi quidem, ullam quos vero at iusto facilis, id maxime?
    </p>
  </div>

</section>
              
            
!

CSS

              
                @import url("https://fonts.googleapis.com/css?family=Lato:400,400i,700");

* {
  box-sizing: border-box;
}

body {
  font-family: Lato, sans-serif;
  font-size: 6vh; // big, big, big
  line-height: 1.3;
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  perspective: 100vw;
  transform-style: preserve-3d;
}

section {
  position: absolute;
  width: 100%;
  height: 100vh;
  border: 1px solid #1d1d1d;
  padding: 0 5vh;
  overflow: hidden;
}

.back {
  transform: translateZ(-50vh);
}

.top {
  transform: rotateX(-90deg) translateZ(-50vh);
}

.bottom {
  transform: rotateX(90deg) translateZ(-50vh);
}

.content {
  position: relative;
  width: 100%;
  height: 100vh;
}

p {
  max-width: 60%;
  margin: 0 auto 2em;
}

img {
  max-width: 100%;
  margin: 1em 0;
}


.top .content {
  top: 100vh;
}

.bottom .content {
  bottom: 105vh;
}
              
            
!

JS

              
                // Thank you, Sarah! (updated event handler)
// https://codepen.io/SarahC
//
// https://developer.mozilla.org/en-US/docs/Web/Events/wheel#Listening_to_this_event_across_browser
// creates a global "addWheelListener" method
// example: addWheelListener( elem, function( e ) { console.log( e.deltaY ); e.preventDefault(); } );
(function(window,document) {
  var prefix = "", _addEventListener, support;
  // detect event model
  if ( window.addEventListener ) {
    _addEventListener = "addEventListener";
  } else {
    _addEventListener = "attachEvent";
    prefix = "on";
  }
  // detect available wheel event
  support = "onwheel" in document.createElement("div") ? "wheel" : // Modern browsers support "wheel"
  document.onmousewheel !== undefined ? "mousewheel" : // Webkit and IE support at least "mousewheel"
  "DOMMouseScroll"; // let's assume that remaining browsers are older Firefox
  window.addWheelListener = function( elem, callback, useCapture ) {
    _addWheelListener( elem, support, callback, useCapture );
    // handle MozMousePixelScroll in older Firefox
    if( support == "DOMMouseScroll" ) {
      _addWheelListener( elem, "MozMousePixelScroll", callback, useCapture );
    }
  };
  function _addWheelListener( elem, eventName, callback, useCapture ) {
    elem[ _addEventListener ]( prefix + eventName, support == "wheel" ? callback : function( originalEvent ) {
      !originalEvent && ( originalEvent = window.event );
      // create a normalized event object
      var event = {
        // keep a ref to the original event object
        originalEvent: originalEvent,
        target: originalEvent.target || originalEvent.srcElement,
        type: "wheel",
        deltaMode: originalEvent.type == "MozMousePixelScroll" ? 0 : 1,
        deltaX: 0,
        deltaY: 0,
        deltaZ: 0,
        preventDefault: function() {
          originalEvent.preventDefault ?
            originalEvent.preventDefault() :
          originalEvent.returnValue = false;
        }
      };
      // calculate deltaY (and deltaX) according to the event
      if ( support == "mousewheel" ) {
        event.deltaY = - 1/40 * originalEvent.wheelDelta;
        // Webkit also support wheelDeltaX
        originalEvent.wheelDeltaX && ( event.deltaX = - 1/40 * originalEvent.wheelDeltaX );
      } else {
        event.deltaY = originalEvent.deltaY || originalEvent.detail;
      }
      return callback( event );
    }, useCapture || false );
  }
})(window,document);

var topE = document.querySelector(".top .content");
var bottomE = document.querySelector(".bottom .content");
var backE = document.querySelector(".back .content");

addWheelListener(window, function (e) {
  var scrolled = parseInt(e.deltaY * 1.5);
  var currTop = parseInt(window.getComputedStyle(topE).top.split("px")[0]);
  var currBottom = parseInt(window.getComputedStyle(bottomE).bottom.split("px")[0]);
  var currBack = parseInt(window.getComputedStyle(backE).bottom.split("px")[0]);
  TweenMax.to(topE.style, 0.3, {top: currTop - scrolled + "px" });
  TweenMax.to(backE.style, 0.3, {bottom: currBack + scrolled + "px" });
  TweenMax.to(bottomE.style, 0.3, {bottom: currBottom + scrolled + "px" });
  e.preventDefault();
});

              
            
!
999px

Console