Blue season impure sexual intercourse (1996)

A high school girl is asked by her detective father to hand over the ransom for a kidnapping case. However, it was a fake kidnapping. She begins to get to the heart of her case by following her group in search of her father who never returned. A male classmate of hers who has always been supportive of her, and a female senior high school student of hers. In fact, these two held the key to the incident...