Transfer student Kaede Yuzuki ends up not only living next door to Kouhei Aida, but also sitting beside him in class. Kouhei tries to chat with her in hopes of becoming friends, yet their conversations never seem to go anywhere…
One day, Kaede suddenly calls him over, saying she has something important to discuss. The unexpected words she shares with him are—
Thus begins a romantic comedy where the two, from this moment on, become “childhood friends.”