Kotori is an energetic elementary school student who looks great with her curly natural perm. Even now, I will never forget my father, who suddenly passed away one day. I look forward to the day when I can reunite with my mother, who runs her own beauty salon. Her fighting friend is a boy named Goro Morizono. Although he gets a lot of badmouthing, I can't hate him because his cheerful way of laughing is just like my father's. Today, we had a fight, went home, went to cram school, finished a pile of homework, and so on and so on...it's an ordinary, busy day that keeps repeating itself. Kotori sometimes found herself wishing that in her old days she could have lived a more leisurely life. Her wish becomes a reality with a mysterious paper airplane...! ? Crawling swimming towards the past! Love, excitement, and a great adventure! A phantom masterpiece that has not yet been published as a book!