I'm looking for this manhwa that I read some times ago

Hey guys, I'm looking this manhwa of a silver hair and blue eyed ML, he's some kind of Head of the holy knight and his dad is actually the High Priest (his dad look like around 15 years old and shorter than him, I'm shocked too anyway. The dad is actually a crazy psychopath and a douchebag) and the dad order to capture the FL (black haired, I forgot her eyes, maybe brown or red) who kinda have the demon blood in her, and she's in some kind of a cult where their worship her because of her blood but at the same time they are sacrificing her. I believe they called her their savior but anyway the FL actually betray them without them knowing, plotting with the ML, telling him where they hide and in return he spared her (maybe?? I forgot). While she was under custody, the ML keep her close by his side(still in chain) and they do have this intense attraction towards each other and they later on do slept together. But the FL don't believe the ML and she later left him, I don't remember why. And when she's about to escape, she fell off on the river fall and disepeard. The ML later searching her like crazy (but before that he was prisoned by his psychopath father for failing, it was in the prison he realizes he have strong feeling for her. I think he knows he loves her.) So and yeah, he search her like crazy, and the people who search FL from before got no clue how to find her, but ML knows how. I think it's because the FL can't control her power, because one day she could just wake up in other animals like squirrel for example. That's how he finds her. And I don't really read what happened later. I would appreciate it if any of you guys know this manhwa ^^