Seishu Inui/Synopsis

History
Seishu is the second born sibling in the Inui family, 5 years younger than his elder sister Akane. He and his sister share many key characteristics appearance wise. He spent his time with his sister and childhood best friend Kokonoi. Who had a crush on his older sister.

During a fire that tore down the Inui family's house Kokonoi ran into the house to rescue Akane but mistakenly comes out with Seishu; causing his sister to be more injured as she remained in the fire longer. His elder sister later passes away and among that his best friends sanity. Koko often thought of Seishu as Akane going as far as kissing him. They remained by each others sides throughout their lives.

The founder of the Black Dragons Shinichiro took him in. Seishu sees the pure humble nature of Shin and the interactions between him and the gang and wishes to join. Looking up to him and wanting to be like him he started wearing high heels. By the time he was able to join the Black Dragons was taken over by Izana. Who Seishu later despises for ruining the dynamic of the gang Shin created. Alongside Koko they served as Black Dragon 10th Gen. captains of their respected lanes serving under Taiju. Seishu believed Taiju can bring the Black Dragons to strength again.

After the fall of the Black Dragons, Koko and Seishu join Toman and fall under the leadership of Takemichi in the first division. As the battle of the brothers and their respected gangs near, Koko, Takemichi and Seishu get kidnapped and held captive. They later released Seishu and Takemichi but recruited Koko to Tenjiku. Driven by his drive to save Koko, he turns to Takemichi for help. As he sees Shin in Takemichi. He offers him the Black Dragons making him the 11th Gen Leader.

During the fight Seishu cries out to Koko that his sister is dead and he is not her. Seishu also was unable to fight Koko as he meant too much to him.