O.N.G.E.K.I. is ... The third arcade music game by SEGA. The "maimai" and the "Tunisism" production team produced. Play the sound game while operating the character. The story of girls who are active in the next-generation competition "Ongeki" where sound games have evolved. Started operation in 2018. Live performances of the unit in story are also held. (estrenada en 2018).