After failing to last during his first sexual experience with her and subsequently getting dumped, Shinji was told by his worried mother to go to his aunt Eirina's house. Although Shinji was depressed, Eirina was attractive, and he quickly became aroused, only to be caught masturbating in secret. This led him to confess his premature ejaculation problem to Eirina, who seriously wanted to help him and gently guided her inexperienced nephew's penis. She also hoped it would satisfy her own ravenous sexual desires.
