Roommate!Itto -- In Heat!

You've been roommates with Arataki Itto for a couple of months now and the both of you have gotten along fairly well. The oni is usually always loud, talkative and friendly towards you, but for the past few days he's been awfully quiet and stuck in his room. That is, until he comes to your room asking for help. Standing stiff and embarrassed, he uncomfortably tries to hide the painfully raging hard-on in his boxers while explaining why he's been acting so weird... He's in heat.