Author Hotaru Yuyami has just tragically lost his beloved dog. While gazing at a tree in his yard, he notices a strange pink mushroom, and it's...moving?. The mushroom suddenly turns into an adorable dog, and Hotaru decides to take it in. Now, alongside his editor and a mushroom researcher, Hotaru shares heartwarming and hilarious moments with his new capricious companion.

Los niños más sagaces de un orfanato aparentemente perfecto descubren la oscura verdad sobre su hogar y planean fugarse y salvar a todos sus compañeros.