High schooler Kaho Nikaido is having trouble adjusting to her new life in Tokyo. It doesn't get any easier when she is nearly hit by a truck and saved by the handsome Kanade Takahashi! Infatuated with Kanade, she works up the courage to confess. But he warns that if Kaho learns who he is, she won't want him. What could possibly keep her from this stud? Maybe the fact he's a...fifth grader?!