A mysterious Akikan attacks Otoya and leaves Kizaki hospitalized. The next day, Misaki approaches Melon and Kakeru saying that Budoko has gone missing. A possessed Budoko shows up and fights Yell, but she is defeated when the mysterious Akikan takes a shot at Najimi, and then absorbs Yell. Kizaki explains that the attacker was 'the strongest Akikan' who attacks Akikans regardless of being steel or aluminium. Later, Melon gets attacked by Yell and Budoko, who Kakeru deduces are copies...