006KEED-85 When I looked at my boyfriend's smartphone, I saw him having intense sex with my mother Saki Aikawa

Kaori frequently brings her beloved boyfriend, Atsushi, to her parents' house because she doesn't have the money for dates. Her mother, Saki, welcomes Atsushi. They seem like a happy couple and their mother, but in reality, Atsushi and Saki have been having a physical relationship behind Kaori's back. The two continue their relationship secretly so Kaori doesn't find out, but one day, Kaori peeks at Atsushi's smartphone and discovers their relationship...