Begging Forgiveness from Four Eyes

In a slightly aged seaside town, dark 'stagnations'—openings to another dimension—dot the area. Monsters called shadows crawl out from them. People cannot look directly at the stagnations and forget them immediately. Only those who 'did not believe' are later drawn to the stagnations. To challenge a stagnation, one must defeat the Shadow Gatekeeper. The victor gains the power to slay monsters in exchange for their soul being slowly eroded. Only a rare few can see the stagnations, and the boy is