Anzu attends kindergarten alongside her friends, the timid Koume and the eccentric Hiiragi. The trio attempts to make their caretaker, Tsuchida Naozumi, fall in love with Anzu. However, he is evidently more interested in Yamamoto Nanako, an attractive fellow teacher who supervises the adjacent class. Despite Anzu's various efforts to persuade Tsuchida to marry her once she grows up, he hopes for the opportunity to date Yamamoto, or, failing that, to marry her.