JSFiddle - React, Tailwind, and code Playground

HTML

<div id="wrap">
    <img src="http://placekitten.com/500/400" class="big" alt=""/>
    <img src="http://placekitten.com/205/200" class="corner" alt=""/>
</div>

CSS

#wrap { position: relative; }
.big, .corner { display: block; }
.corner { position: absolute; right: 0; bottom: 0; }