Everyone in Kanna's world is getting along splendidly, and she is enjoying her elementary school life. Reading, marathons, and, of course, school lunches -- Kanna loves them all. Not to mention going to the candy store after school! But what will she do when an unexpected change comes over Saikawa-san...? The cold of winter fades into the warmth of summer. Which is faster -- the changing of the seasons or children growing up?