Mourning Demon

Akio's return to his hometown dregs up memories of Yuka, his childhood firend lost ten years ago when he and his friends were playing. Thing is, none of the kids can remember anything about the event, but Akio's memories are of horrific creatures. They're just nightmares, right? Even when one of their group goes missing the day they arrive...? If they aren't alone, who is watching? Source: Mangamo