✬[Highschool AU | Yandere!Len Kagamine x Reader ] (Name) (Last Name) is the unlucky best friend of Rin Kagamine, who is the loud-mouth sister of the school idol, Len Kagamine, who in turn is obsessed with (Name) (Last Name), who has no idea how much her life is going to change. (Name) (Last Name) is in serious trouble. ⚠Warnings : Mild language, violence, and mature content. Disclaimer: I do not own Vocaloid, you, or any of the pictures used in this story!