First year high school girl Sawa Konishi transfers to Amabane High School, an escalator school, because she loves the school's cute uniforms and she thinks it suits her perfectly. She doesn't realize that the school used to be an all-boys school, with this being the first year it has allowed girls. On the first day, she befriends Akira Nagashima, an aspiring manga artist. She also meets Ran Matsuyuki, the son of the school chairman, who kisses her on the forehead as a joke. As her day progresses, she learns most of the boys in the school don't listen to the teachers, following the lead of Ran. Sawa's life in the academy is initially trouble, as she is bullied by the boys. At one point, they threw her shoes in the water and she nearly drowns trying to retrieve them. Ran unexpectedly saves her, causing Sawa to see him in a new light, and she eventually gains respect from the rest of the boys.