This is crazy good physiological yaoi.
The one who is truly in control is the red head. He controls the blond hair boy who we figure out he rescued from a lab experimenting on children. He raised him to be smart and to act more human. The blond falls in love with the ML of the story and kidnaps him. Slowly brain washes him (by rape) that they're in love...now the blond hair man is still undergoing experiments...where will this story take us~
Vivarium