Please be aware of two-timing affairs File 1 (S01E04)

Kageyama drives Reiko and her friends to a bustling summer festival, where they stumble upon a damaged smartphone. The phone belonged to a man who was found poisoned in his apartment, dressed only in his underwear. As Reiko investigates, she realizes that the three women who were simultaneously dating the victim through a matching app don’t match the height of a suspect who was seen leaving his home. This discrepancy leaves Reiko questioning who the real perpetrator might be.