Natsu no Owari no Kokuhaku ~Osananajimi, Onjou Shizuku no Baai~ The Motion Anime

Older classmates call her "the quiet neighbor with big breasts": a small girl, but already has a womanly figure. Shizuku and I are "just friends", even though everyone around knows I'm in love with my childhood friend. In the summer, she joined the pool where I go for training, hoping that I could finally become not just a neighbor but a real boyfriend. I kept my distance, and one evening after my rudeness, she ran to the park and cried on a bench. The temporary coach Sawamura happened by — a handsome, confident older man whom the girls in the stands whisper about. He comforted her, took her to his place, gave her sweet tea with a pill, and at night my friend was brutally raped and she wasn't against it: moaning, deflowered under a phone camera. Since then, after every pool session, Shizuku stays for "extra practice" in the coach's room: secret sex lessons that turn her former feelings for me into a habit of orgasm and sperm on her tongue.