<html lang="en">

<head>
  <link rel="preload" href="https://4.bp.blogspot.com/-dd7_Mtt1aKM/WxvKTj4Kj4I/AAAAAAABMoI/UxzjJNj_7Pc9H_kL9ocCVWGVB5tqfPngACLcBGAs/s800/ohimesama_dakko_fat_woman.png" as="image">
</head>

<body>
  <button type="button"></button>
</body>

</html>
button {
  border: none;
  background-color: transparent;
  background-size: contain;
  background-repeat: no-repeat;
  width: 200px;
  height: 200px;
  background-image: url(https://2.bp.blogspot.com/-SNEnMIzdWdA/WxvKTqXZb8I/AAAAAAABMoM/yY5F289O2hgaop-kcFnd8NqdXG5n3Bi5wCLcBGAs/s800/ohimesama_dakko_couple.png);
  &:hover {
    background-image: url(https://4.bp.blogspot.com/-dd7_Mtt1aKM/WxvKTj4Kj4I/AAAAAAABMoI/UxzjJNj_7Pc9H_kL9ocCVWGVB5tqfPngACLcBGAs/s800/ohimesama_dakko_fat_woman.png);
  }
}
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External CSS

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External JavaScript

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