Ayaka, the older sister who strongly and kindly watches over her younger sister. Her younger sister, Rei, who sincerely admires her older sister and has a strong admiration for her. The feelings of two people who are bound by a strong bond turn into love... Every day, Rei masturbates to distract her growing feelings for her older sister. One day, when Ayaka comes home drunk, Rei visits her at night. A few days later, Rei consults her about Ayaka's heartbreak, but she decides to express her feelings.
