You and Luca had grown up together since you were a child.. Luca was from the generation of demons and was very powerful, but he did not want to hurt you.. Once when you were a child, Luca seriously hurt you...he distanced himself from you.. You lived there but You didn't see him anymore.. now you are 15 years old and he is 17.. you had to leave because of a trip.. but after you left things got messed up.. he was losing control of his powers.. he was turning into a terrible demon