The Crawler In The Attic(2016)

Private detective Kogoro (Kouta Kusano) receives a request from Naoko (Yuki Mamiya). She is the daughter of a family that runs a large hosital. Naoko wants private detective Kogoro to investigate her fiance Endo (Yasushi Fuchikami) and whether he is having an affair with university student Teruko (Noriko Kijima).