I mean... He changed a lot after his heat, so I was wondering if he underwent that change cause he had some after heat depression paired with heartbreak. Not sure if it's a thing in this AU though.
But recently he seems to have finally been getting over how he feels about Seoyu at least. He did mention he was having a hard time getting over him when they met at the cafe all those times. Hopefully he becomes a better friend and not follow Woo-something. Lol forgot his name Honestly though, I was shooketh that Hoin just snapped like that. I was like gah dang chillax on this pessimistic view.
He was overworking himself to impress Seonyu. He does mention that he keeps the cafe open at night for reasons (Seonyu works night shifts) but he also has to keep it open during normal working hours the whole day. Plus, heat is like periods but more extreme, so it likely takes a toll on the body since he doesn't have a partner. Plus, I would say a bit of heartbreak as well.

I'm sorry... can anybody explain to me why hoin like that? Did hoin really have feeling to Seoyoo? Or he have others reason? Its still not really clear to me... btw.. I hope Hoin meet his best alpha too..kinda wish Hoin with sunghyun hehehe...