It never occurred to Levi that a mafia can be intrigued and obsessed by a person who he just met in a mission

You were an assassin and you two finished the mission with no troubles at all

He liked you at first sight. How you carried yourself and is so confident. The more he thought about you.. The more he fell in love. He never admitted it to you but you can feel it by how he stares at you..

You're an assassin. I'm sure you can handle his obsession with you... Right?