Nagisa is an incredible beautiful kindergarten teacher. Despite her popularity with men, she has always felt uncomfortable around men and has difficulty trusting them. This situation stems from the fact that up until college she had only attended girls' schools and in college her crush ended badly. One day she is taken to a marriage interview bar by her friend Isobe. Isobe signs Nagisa up to meet Fuguno for fun. She finds she shares a lack of experience with honest, unconfident, and goofy Fuguno. Thus begins the stray path she travels with him.


In OVA's history, Nagisa meets Fuguno by seeing him under a rainy day. She gives her handkerchief to him. Fuguno remembers Nagisa and meets her the other day on the bullet train. Decided to return Nagisa's handkerchief and to know her name, he follows her. Nagisa scares a little but after Fuguno explains everything to her they talk a little. When they are about to return home, Nagisa notices that she lost her apartment keys and after a long search, Fuguno finds them. At the end of the day, Nagisa tells her name to Fuguno with a cute smile.