Kimito Kagurazaka, an average high school student, is snatched out of his regular school and sent to an elite all-girl school in order to acclimate the students there to boys and to the culture of commoners.

A day in Reiko's life demonstrates how good she is at everything she does, and how the other girls look up to her; Reiko throws Kimito a welcome party; Kimito introduces the girls to instant ramen in a cup.

Kimito runs into child prodigy Hakua Shiodome, a shy girl who writes complex equations, and Karen Jinryo, a self-taught sword master who challenges him to battle.

Reiko invites Kimito to her room to join in a tea party with the other girls; Aika monopolises Kimito's time; Kimito offers to help when Reiko inadvertently offends the rest of the class.

Hakua unexpectedly shows up in Kimito's room one morning, and the two of them make breakfast together; Reiko, Aika, and Karen grow concerned about how Hakua is garnering so much of Kimito's attention, and confront her.

The class takes a field trip to a theme park; Kimito coaches the others through commoner activities.