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

While trying to settle into his new life, Kimito runs into child prodigy Hakua Shiodome, a shy girl who writes complex equations wherever she finds convenient, and Karen Jinryo, a self-taught sword master who challenges him to battle.

When Reiko invites Kimito to her room to join in a tea party with the other girls, Aika monopolizes Kimito's time, insisting that her party planning comes first. 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 the newly-completed theme park "Shominland," where the students get to experience the commoner lifestyle. Kimito coaches the others through almost, but not-quite-authentic commoner activities.