Huh? Development is okay and all but i'm getting jelous on how this guy keeps collecting girls just by sleeping. It doesn't work when i try...
Edit: I strongly think it's not harem but it's a misunderstanding. Maybe she just sleeps a lot herself so she hated when someone's sleep get disturbed that's why he felt close to her due to her sleeping nature.
Or it's harem and she's a childhood friend he doesn't remember that he used her tighs to sleep when they were kids