Ken Shinozuka - 篠塚健

__Height:__ 191 cm Franken is the leader of a gang of delinquents at [Rihito's](https://anilist.co/character/329314/Rihito-Tatsuno) school, and the older brother of [Aoi.](https://anilist.co/character/329315/Aoi-Shinozuka) He uses a screw as an earring, which lead to his nickname. He is willing to fight others for the sake of his juniors, and despite being a delinquent he has never used cigarettes or alcohol. [Ranmaru](https://anilist.co/character/329313/Ranmaru-Mori) quickly recognizes him as a virgin.