A tanuki that can transform into a human X a carefree and airheaded high school girl Yuzu is a high school girl who lives in a small town surrounded by mountains. One day, a certain animal started desperately running after her... and it's actually the tanuki that she had previously sheltered with her umbrella! It seems that the tanuki was trying to return her umbrella and to that Yuzu said, "Thank you. You're very smart, aren't you." But it seems that this tanuki actually has a certain secret... A romance with a tanuki, "Tanukoi." A fresh and fluffy love story!