Today is Friday, Momoko, who has an important meeting at the beginning of the week, is preparing materials with her subordinate Ota.However, no matter where I look in the library, I can't find the material.Then, suddenly, the electricity in the library went out.Come to think of it, I think I saw a poster that said, "Power outage due to facility inspection."The door is electrically locked and does not move.Other employees have gone home and their mobile phones are not charging.In that critical situation, Momoko has to spend until Monday with her young subordinate in a cramped and stuffy library.