Jirou Yamada

MC Name: MC.M.B (Middle Brother)
Division: Ikebukuro
Birthday: February 6th
Solo Song: Sensenfukoku
Quote: We don’t stop playing because we grow old; we grow old because we stop playing.

Second son of the Yamada household and Buster Bros!!!. One of the bosses of Ikebukuro. A strong fighter. He idolizes Ichiro, who is beloved by everyone. He grew up watching his big brother's back, and thus became a delinquent like him.

Just like Ichiro, he hates bullies. Due to his big brother's influence, he is well-versed in anime and light novels. Anyone who makes fun of his big brother will be crushed out (or will be devoured). Always fights with his younger brother, Saburo Yamada.

(Source: HypMic Wiki)