No. 205 Go Eun-Hye

He lives as a killer named No. 205, but one day he follows his landlady's orders to kill No. 204, whom he followed like his own older brother, with his own hands. One day, when she was immersed in regret, her aunt's daughter, Go Eun-hye, moves into room 204, and Go Eun-hye suggests to 205 that they should kill her owner, aunt...