<style>
    * {
        scrollbar-width: none;
    }

    #container {
        width: 300px;
        height: 500px;
        overflow: auto;
        position: relative;
        border: 2px solid black;
    }

    .content {
        background-color: lightblue;
        height: 100%;
    }

    .box {
        background-color: magenta;
        width: 100px;
        height: 50px;
        position: absolute;
        top: 0px;
        right: 50px;
    }
</style>
<div id="container">
    <div class="content">
        <div class="box"></div>
    </div>
</div>