I Get Gang Banged By My Son's Classmates Every Day. Kaoru Fueki

Kaoru has raised her son Tatsuo on her own since her husband passed away. Perhaps due to growing up in a single-mother household, Tatsuo is introverted, and Kaoru worries about whether he gets along with friends. Then one day, Tatsuo brings a classmate home... Kaoru can't hide her joy at the presence of the first classmate Tatsuo has ever brought home, but that joy is quickly betrayed. It turns out Tatsuo was being bullied by his classmates. And the classmates' misdeeds extend even to Kaoru...