“…If you have so much experience, then this much should be nothing to you, right?” Hoshimiya Aira is 17 years old and in her second year of high school. When her father who is working away from the family gets injured, Aira ends up having to stay with her cousin, Ichijou Ema for a while. In the years since they last met, Ema, who is 6 years older than Aira, has grown into an adult overflowing with s*x appeal. Aira, who has next to no experience in love, gets relentlessly teased by the more mature Ema and awakens to new pleasures unknown to her one after another. “Do you have any experience?” “I still haven’t… I mean I’ve done it so many times that I can’t even count them on both my hands.” “…If you have so much experience, then this much should be nothing to you, right?” An age gap yuri between an experienced beautiful woman (23) and a beautiful high school tsundere (17) unfolds!