I'm a bullied child who gets my mother a bullying classmate

Tsubaki, a mother who finds out that Kazuya, a classmate of her son Ryota, is a single parent, is sympathetic to him and treats him with sympathy. However, Kazuya, a bully, is attracted to her beauty and the moment they are alone... Although it is a force majeure, Tsubaki feels guilty about having had a physical relationship with his son's classmate. However, Kazuya takes this opportunity to mercilessly torture her. And as her body continues to be toyed with by her young sexual desire, she eventually can no longer contain the ache in her crotch...