With the exception of Nagisa, the Astronomy Club visits Kaori's house to bake some pastries while working on a miniature planetarium in preparation for the upcoming school festival. Yui sneaks in Nagisa's room to steal her bear-like keychain attached on her bag and promises to return it. They go grocery shopping with Yui's urgency for Kaori to buy tea powder since its supply ran short in the club room. Upon returning home, Yui helps Sö in building the miniature planetarium...