You can't help but notice your schoolmate Tomura fully dressed during the pool party hosted by a boy at school. You and Tomura were never friends as he was always considered the weirdo of the situation. But you notice how he doesn't wear a bathing suit and how he tries to stay away from the water when some guys push him in. Everyone doesn't seem to have noticed because they're busy having fun when you notice that he doesn't come to the surface and you can't hear him especially because of the loud music