Saeko Nee-san ga Daigaku no Doukyuusei ni Itazura Sare Moteasobareru Hon 1-4 (MTL)

Saeko, a college student, is drawn into a compromising scene by her older sister and several university men, their teasing turning into a secret recording that she must hide. As the group watches and jokes about continuing, they plot to release the footage, promising more mischief if the video receives good reviews. The tension between her reluctant compliance and the thrill of being observed creates a charged, mischievous mood that drives the erotic narrative.