JSFiddle - React, Tailwind, and code Playground

HTML

<div class="one">Div ONE</div>

<div class="two">Div TWO</div>

CSS

div {
  height: 150px;
}

.one {
  margin-bottom: 30px; 
  background-color: yellow;;
}

.two {
  background-color: cyan;
  display: none;
}

.one:hover + .two {
  display: block;
}