Example.

<style>

#examplediv{
position: absolute;
top: 200px;
left: 200px;
height: 200px;
width: 200px;
border: 1px solid black;}

.linkactivation:hover + #divactivation{
opacity: 1;
}

#divactivation{
-webkit-transition: all 1s;
transition: all 1s;
opacity: 0;
left: 0px;
bottom: 0px;
height: 30px;
width: 30px;}


</style>

<div id="examplediv">

<a class="linkactivation">FIRST.</a>
<div id="divactivation">Boo.</div><br>
<a class="linkactivation">SECOND.</a>
<div id="divactivation">Boo. Second.</div>

</div>