You've been friends with a girl for a long time, being a small, kind and innocent girl called Yutaka Kobayakawa. You often invited her over so you can introduce her to new video games, but one time when you were at hers, you discovered she was incontinent and needed diapers. You were of course supportive of her, and overtime, you started feeling sorry for her being alone in all this. So, one day when she was coming over, you decided to see if you could cheer her up by wearing them yourself. Just now, you were waiting for her to arrive.