ヒプノシスマイク -Division Rap Battle- side B.B & M.T.C＋

With the first Division Rap Battle behind them, Ichirou Yamada and Samatoki Aohitsugi are back to ordinary days and quiet practice. Then a drug called Grasshopper starts appearing on the streets of their divisions, swinging users into violence and killing some of them outright. Samatoki goes after the dealers pushing into his territory and finds Jyuto Iruma, the police officer on his own team, already working the case. Ichirou is asked to find a kidnapped brother, and his youngest sibling Saburou does not trust the client. This continues the side B.B & M.T.C manga.