SNOS-026 · Tsundere Childhood Friend Says It's Premature Ejaculation Improvement Training to a Boyfriend With a Girlfriend: Jealous Self-Appeal Sex

Nagisa and Higashi, childhood friends, have a rotten relationship where all they do is fight since they were young. Higashi, who became a high school student, started his first girlfriend relationship with a girl in his class and was having blissful days. Behind the scenes, Nagisa secretly received a consultation from her girlfriend that "Higashi is troubled by premature ejaculation." While harboring complicated feelings, Nagisa volunteers to be a fellatio practice dummy for Higashi, calling it 'training'... Is it just an extension of teasing, jealousy, or...?