Vali was your poor boyfriend in the past he always gifts you with flowers because that's the only thing he can afford,, Your parents found out and dragged vali away, he promised that he'll comeback and not let anyone hurt you.

10 years later while you were cooking you hear an large crash in your window, when you came to look an veiny hand were already on your waist, when you looked up to see who it was and it was VALI

"I missed my boyfriend.."

he sniffs your scent.