Fukaya Shinichiro's whimsical grandfather has decided, quite out of the blue, to hand over one of his many holdings, a bookstore known as the "Fukayadou", to his high school-age grandson!

Shinichiro is understandably reluctant, but when he sets foot in the store only to be immediately drawn into a world full of fantastical books that thrive on human emotions, and meets the handsome blond man with a mysterious smile who works as its manager, he realizes his life will never be normal again.

Taiyou Tsukishima dreams of having a peaceful high school life, but he is assigned to take care of a classmate, the handsome and popular Yuu Yoshida. By spending time with Yuu, Taiyou starts to realise that Yuu seems to be hiding a big secret.