Houkago… Futari dake no himitsu. Tachiba gyakuten rezubian – Koakuma na kouhai ni amaku moteasobareru do-M senpai

放課後…二人だけの秘密。立場逆転レズビアン 小悪魔な後輩に甘く弄ばれるドM先輩

Also known as Hōkago… Futari dake no himitsu. Tachiba gyakuten rezubian – Koakuma na kōhai ni amaku moteasobareru do-M senpai, BBAN-520

In a girls’ dormitory, close roommates Mizuki and Ena lead a quiet life—until a mischievous prank from Ena turns everything upside down. Mizuki, the senior, finds herself drawn into Ena’s teasing games, revealing her hidden submissive nature. From that moment on, their after-school hours become a secret ritual of reversed roles and lesbian pleasure, with Mizuki surrendering both body and heart to Ena’s dominance. A hidden master-servant bond that becomes the shape of their youth.