Magnum, who is a big fan of the games made by her husband, a game creator, has come from America. Magnum is a so-called "otaku" and Yumi, his wife, has decided to accompany her busy husband on a tour of otaku mecca. Magnum is excited with a video camera in one hand. However, Yumi's voluptuous body makes Magnum lustful... And without knowing that the camera is set to REC, Magnum approaches Yumi, and Yumi becomes interested in his huge penis, which she has never seen before...