Nori Kamitsuki has recently moved to the Gunma prefecture from Chiba, following after Otoya Todoroki, a former friend who moved there in elementary school. While on the way there, he receives an ominous text message from Todoroki telling him to turn back and that once someone enters Gunma, they never return. Ignoring the message, As Kamitsuki goes about his school life and makes new friends. These people make it thei...