Kim noticed that very few in their batch are actually girls. Though she saw some from the other houses, she can hardly see them in the past few days. Deciding what to do about it, she got up from her bed and stormed out from the girl's dormitory.

After some twist and turns, she finally arrived in the girls' lavatories, where she knows is the only place where girls can see each other without the other gender. Thinking about her worries, the appearance of the lavatory itself caught her attention. She saw some cubicles, divided by tall and wide wooden walls, the mysterious sink that is circled by a certain metal in the middle and the wet flooring like no one has ever been stepped on it for weeks. Kim moved further inside, looking for more things for her to discover. Taking a peak through the window, she heard some quick steps coming nearer to her direction.