Yuu has been waiting for the release of the computer game White Earth, which was developed in total secrecy and had its release date postponed for unknown reasons. He finds out from some friends that he can download it from the game's official site, which results in a child coming out of his computer.

Meet Matsuri, a high-school girl in love. Typical, right? But no one knows what’s in Matsuri’s special protective charm… Mimori, a god of protection! Mimori takes the form of a miniature boy and protects Matsuri from danger while supporting in her quest for romance… Until he realizes that he, too, has feelings for her! Can true love exist between a god and a human?