Edit in JSFiddle

<div class="demo demo2">
  <div class="heading">毎朝ちゃんと飲むUX</div>
</div>

.demo2 .heading {
  background: #3cb3e4;
  padding: 5px 15px;
  border-radius: 0 10px 0 10px;
  color: #fff;
}