Shirosaki Rinko is a high schooler who loves kindergarteners and helps out at the kindergarten that her little brother attends. She’s all excited because tomorrow is the day a new student is admitted! That’s why she’s not bothered at all by the scary-looking delinquent Tsuga-kun and the good-looking glasses-wearing Mogami-kun. That is, until she hears them saying “what time do we meet them at the kindergarten?”. Now she’s curious: what business do they have at the kindergarten?