The man I fell in love with is the man who killed my father! Yamato is a high school student who wants to become a police officer just like her late father. One day, she is rescued by Jin, who went to the same school as her, when she got caught up with a man. Yamato is gradually attracted to Jin's kindness and strength. However, Jin is the son of the yakuza and is suspected of killing Yamato's father...! It's a love battle for the truth between the son of a yakuza and the daughter of a policeman, two people who never cross paths!