JSFiddle - React, Tailwind, and code Playground

HTML

<body>
	<div class="imgholder">
		<img src="http://i.imgur.com/55BpAX9.png" />
	</div>
</body>

CSS

* {
    margin: 0;
    padding: 0;
}

body {
	background: #000;
}

.imgholder {
    position: relative; // added
	margin: 5px;
	// background: #fff;
	float: left;
	height: 200px;
	// border-radius: 200px / 110px;
	transition: border-radius 0.3s ease-out;
}

.imgholder img,
.imgholder:after {
	border-radius: 200px / 110px;
	transition: 0.3s ease-out;
}

.imgholder:after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: rgba(255,255,255,.3);
    opacity: 0;
}

.imgholder:hover:after { opacity: 1; }

.imgholder:hover{
	border-radius: 20px;
}

.imgholder:hover img,
.imgholder:hover:after {
	border-radius: 20px;
}