Yuki works as a "dormitory mother" in a baseball club dormitory at a certain school. - She used to be a lively dormitory, but now she has only three members ... Yuki couldn't get a satisfactory dormitory fee and was holding her head every day. - Yuki's main concern is the "power outage" that occurs frequently these days. - Every time a thunder struck, the dormitory had a power outage and the members were sickening every day. - One day, a power outage occurs again. - Yuki with a flashlight came to the member who couldn't sleep at the wrong time.