قسمت 1: دختر فضایی لالا به حمام ریتو تلپورت می‌شود و او را به عنوان نامزدش اعلام می‌کند

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Rito Yūki is a fifteen-year-old boy who has tried to confess to the girl whom he loves, Haruna Sairenji, numerous times but has been unable to do so through the strangest of circumstances. Meanwhile a mysterious extraterrestrial girl named Lala runs away to Earth in order to avoid daily arranged marriage candidate interviews set up by her father, the king of her home planet, Deviluke, as well as Emperor of the Milky Way Galaxy and Ruler of the known universe. Using one of her own inventions, she teleports naked into Rito's bathtub, where he accidentally gropes her breasts. It is later revealed to him that this is equivalent to a marriage proposal on Deviluke, and Lala happily accepts that she is to become Rito's future bride. Because Rito tried to save her from her uncle Zastin who came on the order of her father to bring Lala back home, Rito, on the other hand, due to his feelings for Haruna, does not want anything to do with Lala. (Source: Wikipedia)