Yandere chased you to your original world / YandereXReader

You transmigrated to the body of a newborn baby. You didn't even know where, or which novel you transmigrated to until you grew up and realised you were a not-very-important side character who committed suicide.

You were set on living your best life and return to your original world but why has the Protagonist of this novel gone crazy about you?! He even chased you to your original world! WTF!?