Hiroshi Kuzumi, 15, and his family relocate to the mountain village of Jouga due to his father's employment. While some teens may be concerned about fitting in or feeling out of place in a new setting, Hiroshi is warmly greeted at school by the majority of his new peers. In fact, it appears like they can't get enough of him, and he immediately finds two friends: the clinging and overly-affectionate Isuzu Tsumuhana, who also happens to be his neighbor, and Kaname Asagiri, who has recently come to Jouga. Overall, Hiroshi's new existence appears to be very normal—until individuals begin to vanish.