The Heir's Keeper

Aria Marcelli, a young college student who is shy and reserve. Frail to the eyes and beautiful, she can do no harm. Except to the fact that she is the heir to the Union organization. One of the founding mafia of Asia that had been known for dealing arsenals to the Philippine military. Nicollo Porva, a man with low ambition and had tasted bitter wine in life have no choice to come back to work as the young heiress bodyguard. His mission is to protect her from peril until she is able to take the control over the business.
Plague by his own demons, he soon look at Aria like a ray of warm sun that touched his tortured soul, or whatever that means for a man who will throw away their life and take away life when he see fit.
Simple, until when his heart decided that he falls for Aria.

Aria had never want to show motives, but why is it whenever Nicollo is near she sometimes forget why he is there, and to what she is trying to fight for? Asking question that she too can't answer. Was it loneliness?

Is it she who fell for him or was it him?
Was it comfort or convenience that made them drawn together?