Need helping finding the manga

[itjustworks98]

The series is about the main character who starts university and gets to live a childhood friend who he hasn't seen in 10ish years. She's a couple years older than him and her name might be Luna/Runa (or something along those lines). He can't sleep at night while living with her as she's being loud every single night, the guy thinks she's doing it with some guys but she's just playing with herself. There's also 2 other childhood friends - one is a close friend of a girl he lives with, and the other one is a fellow university student who happens to like biting him.

I was reading it not that long ago, but can't remember its name. The was only 15-20 chapters out, so there shouldn't be that many more.