Toukankaku no Kuroi Toumei

――You’re tasked with torturing and killing a girl.―― “I” was bought by Risako, who had more money, time, and loneliness than she knew what to do with. One day, a man with a camel's head appeared before me and said “I” have to pay for getting bogged down in my feelings for Risako and resisting change. “I” loved my dead “sister” so much it almost broke me. But it seems she hasn’t fallen into hell yet. Hints from the camelhead led me there, guided by a three-legged cat. I found a “girl” abandoned by Risako before “I” could arrive. And just when things couldn’t get any worse, “I” start falling for her—someone I'm meant to kill. Thus unfolds this twisted nightmare of “love” and “change.” [Translated from the official website]