i think kouchi eats/exercise more because he wants to keep up with caius' sex drive. caius wanted to fuck him non stop but kouchi couldn't continue because he was too exhausted. so he felt like it's unfair that only him being satisfied with their sex life while caius didnt. and caius didn't want to fuck him because he thinks kouchi is fragile, and he's afraid of hurting him

Am I the only one who things Kouichi is actually pregnant now? I mean he said he is eating more so that he could get more energy or whatever, but what if that means he is pregnant and is craving stuff. Also it could be the reason why Caius is not doing “it” with Kouichi right now as he is able to tell?