Read Setouchi kun ha Hitoriyogari manga at Bonmanga !
Renta: Setouchi obtains a very strange adult toy. In his search for the best self-gratification experience, he gets Niyama to hold said toy and morphs it into his shape! However, Setouchi forgets to turn off sync mode, causing Niyama to unwittingly become part of his morning and nightly rituals. Realizing something’s up, Niyama confronts Setouchi and offers him the real deal. This story is a first-rate raunchy yet innocent romcom about two men connected, quite literally, through a toy!
Alternative Setouchi is a Master of Self-Gratification