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

Her husband is Rin, who lives with her son Kazuya on a long business trip. One day, Kazuya's classmate Ashida comes to apologize because he feels guilty for bullying Kazuya... Rin, who has involuntarily sympathizes with his honest apologies, begins to take care of him without question. However, Ashida's true feelings of kindness are returned with his nemesis by violating Rin... When they are alone, they forcefully form a contract with their girlfriend. Although it is a force majeure, Rin is troubled by an infidelity with his son's classmate. However, my body couldn't contain the pain from the pleasure of the penis that I had experienced for the first time in a while...