I was confused why he named his cat after intestines. I'm embarrassed to say it took a lon...

It is not the intestines. What he meant is the 2 moles under Yuutarou's eyes that looks like a colon, the puctuation mark (:). But the only difference is that it is position horizontally like this: "••". The more obvious example is the moles in Sakusa Kiyoomi's (Haikyuu character) forehead.

I'm sorryyyy, I didn't read your comment carefully. I thought you still have misunderstanding about the name >_<

Hahaha no worries. I forgot I even made this comment