Yuki works as a ``dormitory mother'' at a certain school's baseball club dormitory. - The dormitory used to be lively, but now there are only three members... Yuki spends her days worrying about not being able to get enough dormitory fees. - Yuki's main worry is the frequent power outages. - Every time lightning strikes, the power goes out in the dormitory, and the club members spend their days in fear. - Then one day, the power goes out again. - Yuki comes with a flashlight to the club members who can't sleep due to bad timing...