<main>
  <h1>normal</h1>
  <p>私の夢は田舎で静かに暮らすことだ。私は爪先立ちで踊れる。</p>

  <h1>line-break: anywhere</h1>
  <p class="bottom">私の夢は田舎で静かに暮らすことだ。私は爪先立ちで踊れる。</p>
</main>
body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  margin: 0;
  color: #fff;
  background-image: linear-gradient(20deg, #4062bb, #f9c5d1);
  font: 1.5rem/1.333 'Oxygen Mono', monospace;
  overflow-x: hidden;
}

@media (max-width: 500px) {
  body {
    font-size: 1.125rem;
  }
}

main {
  position: relative;
  margin: 15px 10px;
}

main::after {
  content: '';
  display: block;
  position: absolute;
  top: 16px;
  left: calc(27ch + 9px);
  bottom: 0;
  border-left: 2px dashed #fff6;
}

h1 {
  position: relative;
  z-index: 2;
  width: min-content;
  margin: 0 10px;
  padding: 5px 10px;
  border-radius: 4px;
  background-color: #000;
  font-weight: normal;
  font-size: 0.667em;
  white-space: nowrap;
  transform: translateY(50%);
}

p {
  width: 27ch;
  margin: 0 0 15px;
  padding: 20px 10px 10px;
  border-radius: 4px;
  background-color: #0006;
}

.bottom {
  line-break: anywhere;
}

External CSS

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External JavaScript

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