Things You Can Do As Two.After finishing filming a TV mystery mini-drama, Ryügü Komachi and Ritsuko return to the 765 Production office for a break with Mami and the Producer returning as well. Iori promises to treat everyone to some special puddings she had bought earlier, only to find the puddings gone from the refrigerator. Suspecting the other idols as the culprits, Ami and Mami decide to solve the mystery by playing detectives. As the twins investigate and interrogate the others with their antics, Mami admits to the Producer she feels bored and lonely without her sister but hopes to be famous like Ami and be together again...