Kuroi, is a son of a yakuza family. He has a childhood friend that always cling to him, Shirakaba Touma. Touma realized he's in love with Kuroi ever since they're in elementary school, when he saw Kuroi weeping in the corner by himself when they're on school trip bc no one want to play with him. (Kuroi had no friends bc they're afraid of his family)
Naked Sword and the Tree Peony of Black