In the Cage
Complete | Satou Sanayuki | 2018 released
YESSSSSSSSSSSSSSS. I'm a sucker for these types of mangas (as long as the MC is not whiny/indecisive) where the ML steals away the MC from a lover who doesn't treasure him. I don't know what's up with Eiji, since there aren't enough chapters yet, but I'm kind of rooting for Reiji.
Koi to wa Yobenai