Based on a shounen manga written by Hasemi Saki and illustrated by Yabuki Kentarou, serialised in Weekly Shounen Jump.

A year after Lala came to Earth, she is all the more determined to make Rito fall for her, putting all her effort into it, even though she knows that Rito actually loves Haruna. Poor Rito will have to face tough times since Lala's younger twin sisters, Nana and Momo, now live in the same house, along with Rito's reliable sister, Mikan, and Celine.

Fun and trouble await with their friends from school, with Lala's usually catastrophic inventions, and Yami's contract to kill Rito...