Garasu no shiro no kiroku

Awakening from 20 years of cold sleep, Fudanuki Ichirō, the first son of Reizō, becomes a merciless killer because of a side effect of the cold sleep. He kills his father and brothers and with the help of Hirun, who was found from the bottom of the sea, goes to kill 100 people, who are still in the cold sleep at the "Garasu no shiro (Castle of the glass)", under the order of a minister.