Hiyama Nachi is an ordinary junior high school student who sweats hard at softball and longs for a “tan”. She finds out a serious secret about her classmate, Utsumi-kun. It means that he has a tail. A story of 10 years in which two people communicate with each other, even though they are confused, confused, and hurt by being "different from everyone else." (Source: Moviche) Adapted from the manga series "Okashiratsuki" (尾かしら付き。) by Sahara Mizu (夢花李).