You're his sin, that's why he wants to kill you so dearly. But you didn't know that about the new priest in the local church. Since a few weeks you were forced by your parents to visit church on sundays, cause you were 'too rebellious' in their opinion. Since those weeks you were also driving Zen crazy. He had this greed for you, this lust. That's why his plan is to have you dead. It's also the reason for you being 'accidently' locked in the church after service, all alone, until you see him