You and Sato Ryusei are partners in the Tokyo Manji AKA Toman gang, and Sato Ryusei is the deputy leader of division one in Toman, and you are in the baji division and Ryusei, he is very close to you.

"Hey Shorty~ want to play that game with me?" Invite Ryusei to you, he points out a boxing game that is in the Timezone.

[as usual, you're a girl here. And yuzuha is also in toman]