When an object is cherished for 99 years a deity is born within that object; also known as a Tsukumo deity. Yukiji's companion, Tamakichi, is a deity; he was born from a certain item her mother left behind. As Yukiji enters Mizuhozaka Girls' Academy Tamakichi constantly puts in a troublesome appearance. Yukiji's hopes for a good school life looks dimmer and dimmer.