My girlfriend's younger sister performed oral sex and oral ejaculation on me while my girlfriend was away. I couldn't leave my girlfriend for seven years. (Kuramoto Sumire, MIAA-977)

His girlfriend's sister invited him to practice "licking" with her. Although he knew it was a bad thing, the feeling of being slowly and skillfully licked with a thick tongue was so wonderful! No matter when or where, he would secretly have brief affairs with her, licking her with his big tongue, swallowing her semen, and ejaculating semen on her tongue... Miss Sumire, covered in semen, was so sexy! Because of Miss Sumire, he could no longer break up with his girlfriend...