What’s this?! A robot that looks exactly like Keitaro appears out of the blue at the Hinata House?! Under vicious attack, the tenants of the all girls' dorm band together to fend off this out of control "Mecha-Keitaro." Meanwhile, Motoko struggles to show off her special skills in an effort to impress her visiting sister, Tsuruko. But her secret spell ends in disaster as Motoko ends up switching bodies with Kitsune! What will happen next...?