Adachi and Shimamura meet in the first episode while skipping class. Adachi feels as though classes have no meaning, so they decide to go grab some donuts and to walk around the city. As they were walking, Shimamura grabbed hold of Adachi's hand, which made her flustered, making her heart beat faster. At that exact moment, a little astronaut-looking creature appears in front of them. This turns out to be Yashiro. Adachi and Shimamura are not normal humans, they are special existences and need to