her sister is mazo's daughter, yokomiya shichikai.

She and I are college students. Her sister "Shichikai" is a female school student. Shichikai was actually a masochist with a face that seemed to be quiet. One day, Shichikai realizes I'm watching and shows off his masturbation and tempts him. I was surprised, but I decided to train her eccentric sister. stealing her eyes and repeating masochism... Her relationship with her sister escalated day by day, and she became a complete masochist who repeated her peak in tight sex. No. P for the Elderly