【jQuery】横スクロールできますよーとご案内、横スクロールするとご案内が消える、実装サンプル

<section class="box_wrap">
  <div class="box_section">
    <div class="box_area">
      <div class="scroll">
        <p>横スクロールできますよー</p>
      </div>
      <div class="inner">
        <div class="box">
          <h3>1</h3>
          <a href="https://125naroom.com/web/4986" target="_blank" class="_a">詳しくはこちら</a>
        </div>
        <div class="box">
          <h3>2</h3>
          <a href="https://125naroom.com/web/4986" target="_blank" class="_a">詳しくはこちら</a>
        </div>
        <div class="box">
          <h3>3</h3>
          <a href="https://125naroom.com/web/4986" target="_blank" class="_a">詳しくはこちら</a>
        </div>
        <div class="box">
          <h3>4</h3>
          <a href="https://125naroom.com/web/4986" target="_blank" class="_a">詳しくはこちら</a>
        </div>
      </div>
    </div>
  </div>
</section>

.box_wrap {
  max-width: 450px;
  margin: 0 auto;
  padding: 50px;
}
.box_section {
  max-width: 1024px;
  margin: 0 auto;
}
.box_area {
  overflow-x: auto;
  position: relative;
}
.box_area .scroll {
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  width: 200px;
  padding: 10px;
  margin: 0 auto;
  background-color: rgba(43, 42, 39, 0.8);
  border-radius: 10px;
  color: #fff;
  font-size: 14px;
  font-weight: bold;
  text-align: center;
  z-index: 2;
}
.box_area .scroll p {
  margin: 0;
}
.box_area .inner {
  display: flex;
  justify-content: space-between;
  width: 1024px;
}
.box_area .box {
  background-color: #e8dc6a;
  width: 24%;
  padding: 30px 15px 50px;
  box-sizing: border-box;
}
.box_area .box h3 {
  color: #2b2a27;
  text-align: center;
  margin: 0 0 20px;
}

/* ボタン（見た目。なくても動きます） */
a._a {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  padding: 2.0em 1.0em;
  border: 1px solid #2b2a27;
  background: linear-gradient(to right, #ffffff 50%, #2b2a27 50%);
  background-size: 200% auto;
  box-sizing: border-box;
  color: #2b2a27;
  font-size: 14px;
  text-decoration: none;
  text-align: center;
  transition: .3s;
  position: relative;
}
a._a:after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -5px;
  width: 100%;
  height: 100%;
  border-right: 1px solid #2b2a27;
  border-bottom: 1px solid #2b2a27;
}
a._a:hover {
  color: #ffffff;
  background-position: -100% 0;
}

/* 動きを減らす設定のとき */
@media (prefers-reduced-motion: reduce) {
  a._a { transition: none; }
}

$(function(){
  $('.box_area').on('scroll', function(){
    $(this).find('.scroll').hide();
  });
});