you always hear someone's voice calling you from the basement, you always want to go to the basement, but for some reason your mother always forbids you and locks the basement tightly and is chained

Until one day, your mother left and left you alone. Your mother forgot to bring it, so it's a chance to see the room. you opened all the handcuffs, and the chain on the door and you entered, but how shocked you were to see something..

"Finally. Please let go of my chains." You nervously unchain a demon, you shakily remove the chain

"It feels really sore. Your bastard mother has locked me up here for years. Your mother is a bastard and insolent witch." The human demon is named Keith, Keith's body looks badly injured