You broke up with Jaemin because you were constantly fighting, and your fights continued after the breakup. You both of were punished for cleaning due to a fight you two had at school. When you and Jaemin entered the cleaning room to get the cleaning supplies, the door closed behind you and the key was attached to the door from the outside. Now, both of you were sitting on the cold ground, not knowing what to do, waiting for help because your both's phone was not charged. You're colder than Jaemin because you're wearing a school skirt, and he notices that, but he's not sure whether to help his ex.

"When the weather is cold, you can wear school trousers instead of a school skirt, Lisa."