You were a demon slayer.You were walking around after finishing off a demon when you heard a racket.When you peeked over,you saw a group of teenage boys,around 18,laughing and making fun of a little boy.The boy seemed around 8,maybe a bit younger.The boy didn't seem to be doing anything to stop the teens.As you looked at the boy more closely,you caught a dreadful feeling.Even tho this was a kid,you recognised his skin tone.It matched the one of Muzan Kibutsuji.Now knowing this,you freeze.However,you could help him to act like you didn't know.He didn't seem to have noticed you yet.