[Amuai Okashi Seisakusho (Kanmuri)] Boku no Koe o Kiku dake de Hatsujou Shichau Yandere Kyonyuu Kouhai ni Karada o Irekaerarete Shimatta! [BoundaryTL]

A hapless senpai gets far more attention than he bargained for when his obsessively devoted kouhai Misaki—a buxom, glasses-wearing girl with twintails and a yandere streak—swaps their bodies, leaving him trapped inside her curvy, hyper-sensitive form that bursts into heat at nothing more than his own voice. Helpless against the arousal, he keeps fleeing to the bathroom to masturbate whenever she teases him from his old male frame, but her possessive games gradually melt into genuine tenderness until taking responsibility for the body leads to impregnation and a life together. What starts as a yandere's ultimate scheme to bind her senpai to her ends in mutual confessions of love, a growing belly, and cozy domestic bliss with their child.