To take revenge on Tarou, who ruined their plans to peep on the girls in the infirmary during the physical examination a few months ago, one of the boys lied and said to Tarou that the soccer captain was sorting the cones in the gym storage room and he wanted a word with Tarou. When Tarou goes to the gym storage, he gets locked inside. But Sachiko was putting back the volleyballs there and she was locked with him as a collateral victim. They can’t escape and no one hears their screams. They have to spend the night there. Sachiko gets scared, hungry and needs to take a pee. Reluctantly, she does it in a corner. Then, Tarou lays a gymnastic mattress on the floor and they sleep together using Tarou’s jacket as a blanket, because it’s very cold. Tarou tells Sachiko that they should remove their clothes to warm up each other as a joke. They fall asleep and Tarou has a nightmare because of Sachiko. He wakes up a little before midnight and needs to take a pee too. When he’s about to do it in the same spot where Sachiko did it, Hirota-sensei, who was doing a school search after their worried families phoned the school, enters the room and thinks it was Tarou who made the mess there. Tarou complains and orders Sachiko to tell Hirota-sensei the truth, but Sachiko lies and Tarou got really mad at her.