She takes on the challenge of deflowering a virgin for the first time in her life! She wears costumes such as schoolgirl and gym clothes as requested, and since the partner is a virgin with even less experience than her, Momoka Kato, a more lewd older sister than ever before, takes the lead more than usual. During the erotic lecture, there are accidental ejaculations and continuous ejaculations, but perhaps her maternal instincts have blossomed from the virgin's reaction, and she embraces him gently and gently.