When I looked into my boyfriend's smartphone, he was having violent sex with my mother Saki Aikawa
Kaori frequently brings her beloved boyfriend, Atsushi, to her parents' house because she doesn't have the money to go on dates. Atsushi's mother, Saki, welcomes Atsushi. They seem to be a happy couple and their mother, but in reality, Atsushi and Saki are having a physical relationship hidden from Kaori. The two secretly continue their relationship so that Kaori won't find out, but one day Kaori peeks into Atsushi's smartphone and notices their relationship...
