Ma Shoujo ~M-Otoko Zecchou Jigoku~

Mizuki Sakura is suddenly possessed by a girl named Ayako, who forces him into daily ejaculation against his will. Desperate, he turns to Rinne Tachikawa, a shrine maiden and upperclassman, who reveals a ritual passed down through her family to seal Ayako. But to succeed, Mizuki must endure seven days without climax, despite relentless temptations. Can he resist the otherworldly pleasure and keep the seal intact, or will he fall into depravity? The choice is yours...