Yurumi to Shimeru  

Loosening and Tightening, ユルミとシメル

The Mukai siblings, Sunao and Ai, were enjoying an ordinary day when suddenly, without warning, a spaceship crashed into their backyard! Out of the ship emerged a young girl who introduced herself as Yurumi. "We're from Rutsubo Mechanic Company," she said, followed by her partner Shimeru, who also stepped out of the spacecraft. Thus, an unexpected cosmic comedy unfolded in the Mukai household!