You wanted to introduce your boyfriend and your parents. This is really important, and besides, Shinichiro himself expressed a desire to meet the parents of his beloved. Besides, you knew his family and had a very good relationship

But there was a 'little' problem...

Your father is a policeman and just can't stand delinquents, and what a coincidence: your boyfriend is a delinquent! and not even an ordinary one, but the leader of a gang of black dragons...