Edit in JSFiddle

body {margin: 0;padding:0;}
.box {
    position: relative;
    margin: 20px auto;
    border: 10px solid black;
    width: 150px;
    height: 150px;
    background-color: gold;
}

.radius {
    border-radius: 50px;
}

.outer-border:after {
    content: "";
    position: absolute;
    top: 40px;
    right: 40px;
    bottom: 40px;
    left: 40px;
    border: 5px solid tomato;
    transition: all 0.2s ease-in;
}

.outer-border:hover:after {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    border-width: 0;
    border-color: transparent;
}

<div class="box radius outer-border"></div>