Your the Turtles little sister

Em and Alissa caught their boyfriends, Raph and Donnie, cheating on them with April and Mona Wow this is gonna be so bad XD. Its a tmnt yandere story. It's gonna be bad I know it! XD Em isn't mine. Just a friends

(TMNT) Four young boys are adopted at different times by the same man. A tragedy in the woods and a deal in the darkness changes the lives of the two youngest forever. Losing your mind is better than losing a friend. Secrets must be kept in order to keep everyone's sanity in check

Raph's been bullying Leo since they were ten years old. Leo's been self-conscious about himself ever since. He loves Raph and wants him to love him back. What happens to our leader once he breaks? This is clarified in the book in a non-chapter, but to be clear: This is not T-cest. Donnie and Leo are brothers, Raph and Mikey are brothers, and that's it. Donnie is not related Mikey or Raph, neither is Leo and vice versa. More details in "Just so you know".