Haruna wins a south island resort trip for ten females. She invites Lala and Mikan to the vacation. Rito, thanks to the mess that Lala left behind, activates one of Lala's inventions and gets stuck inside Maron's (Haruna's dog) body. Mistaking it as a bag that Lala left behind (the invention initially turns Maron into a bag), Mikan takes the bag with her, not knowing that she has also brought Rito along with them. (thetvdb.com)