01kamishibai.css

.page-outer{
  position: sticky;
  bottom: 0;
  box-shadow: 0 10px 5px -5px rgba(0,0,0,.5);
}
.page-outer.z1{
  z-index: 10;
}
.page-outer.z2{
  z-index: 9;
}
.page-outer.z3{
  z-index: 8;
}
.page-outer.z4{
  z-index: 7;
}
.page-outer.z5{
  z-index: 6;
}
.page-outer.z6{
  z-index: 5;
}
.page-outer.z7{
  z-index: 4;
}
.page-outer.z8{
  z-index: 3;
}
.page{
  display: block;
  width: 100%;
  height: 100vh;
  object-fit: cover;
}

02kamishibai.html

<div class="page-outer z1"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z2"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z3"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z4"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z5"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z6"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z7"><img src="path/to/img" alt="alt" class="page"></div>
<div class="page-outer z8"><img src="path/to/img" alt="alt" class="page"></div>