School life has finally started. Fine and Rein is in the same class. Tamba Rin's their homeroom teacher, and takes place on the group lesson. Then, the female students stare intensely at Rein and Fine. They met a girl named Lemon, the Princess of Planet Naniwan. Lemon does not work quite with Fine and Rein's talent in comedy, but she decides to partner with them and make a comic dialogue. While practicing, however, Lemon seems to suffer from a trauma brought about his brother, Melon.