Ash's feed

That redhead dude at the end of chap 45 is Sieon's ex. It was confirmed on Twitter by the author.
Apparently he was a piece of sh*t to Sieon. If I understood correctly he might've been physically abusive to Sieon and that's why they broke it off (take this w a grain of salt cuz it wasn't explicit but implied).
Why does Doyun sunbae hangs out w trash like this?thought he was better than that. Also y the author wants to make us suffer so much, like we don't need this kind of negativity (︶︿︶)