Lamenting her monotonous daily life, manga artist Morita-chan goes into the mountains. "I wish a spaceship would come down..." she mutters, and just as she does, she is crushed by a spaceship and dies instantly.

However, she is revived by alien sisters Yurin and Poo-chan. Mistaking Morita-chan for an Earth ant, they select her as an observation subject for Poo-chan's picture diary.

On top of that, the spaceship breaks down, and the aliens end up staying at Morita-chan's house... This is the beginning of an absurd cohabitation story between an alien hoping to graduate from kindergarten and a manga artist desperate to protect his life! Will they be able to remain human?