Below code using CSS
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
<style type="text/css">
.bottom, .top {
width: 200px;
height: 200px;
}
.bottom { background-color: black; }
.top {
background-color: red;
transform: translate(0, 0%);
transition: transform .3s ease;
will-change: transform;
}
.top.covered { transform: translate(0, 100%); }
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$(document).on('mouseover', '.bottom', function(){
$(".top").addClass("covered");
});
$(document).on('mouseout', '.top', function(){
$(".top").removeClass("covered");
});
});
</script>
</head>
<body>
<div id="container">
<div class="top"></div>
<div class="bottom"></div>
</div>
</body>
</html>
And the fiddle: https://jsfiddle.net/beekvang/mpecfc1n/