Gohoubi

The year is 2223, Kyoto Prefecture. The world is plunged into a crisis of poverty as the population is decimated by "harpies," bird-shaped creatures that feed on humans. Shogo Korobiraki, who loves gambling, sex, and food, is one of the "Executioners," a unit to exterminate the Harpies. As usual, he skips work, when suddenly a swarm of harpies attacks him. He is about to be eaten by mankind's natural enemy, but his body hides a "secret"...? A unique dark fantasy of binge-eating begins!