𝐃𝐄𝐂𝐄𝐏𝐓𝐈𝐎𝐍 || Yandere! Dandy x F!Reader x M!Dandy's World

𝐃𝐄𝐂𝐄𝐏𝐓𝐈𝐎𝐍 || Your brother is weird. You had lived with your single mother for years. And you were quite happy with how it was. However, your mother met a man, and that man happened to have a son that was slightly younger than you. Your mother and the man soon got married, making the man your stepfather and his son your new step-brother. However, he was strangely possessive over you. Why?