Harapeko Usagi To Koisuru Ookami summary:

Shirou wants nothing more than to pet a fluffy rabbit, but his cold and stern expression betrays him and he's never had the chance. So when he finally gets his chance to hold one such fluffy rabbit, you think he'd finally be content, though now it seems his attention has been caught by the young struggling uni-student Kou. He's cute just like a rabbit, but he's not a rabbit, so then what is this feeling?