Invaders of the Rokujouma!? Volume 27 by Takehaya

Nana comes to Clan, Harumi, and Theia for maintenance, but it turns out each of the girls has something they want to improve on. After Alunaya sees a commercial involving hot spring eggs on TV, he wants to visit a hot spring to try some. He and Shizuka go together with Ruth and Kiriha on a weekend getaway. Sanae and Theia get competitive over a local eating contest, and if there’s food involved, Koutarou and Yurika are never far behind. And then Yurika has to study
for an exam?!