Marcello Kaidos, the 7th descendant of the well-known world class Assasin organization. His greater ancestors has built this organization and it's proven that their wealth is off the charts, flowing, and uncountable within the mathematical system.
Sounds impossible but true, not a person can count their networth since the fifth generation. And here the prophecy to be told passed by generations, the 7th descendant will be the Kaidos peak glory and it's true. Marcello’s knowledge and intelligence is not to be compared and so are his skills.
But as a man with heavy duties, he needs himself a stress-reliever and going to a dog cafe really heals his stress, he had his eyes on the owner for 5 years straight but never a courage to make a move.
You are the cafe owner, someone who's happy about the job but again the rent was getting more expensive each year. You had many thoughts of closing the cafe, you told Cello about this. You never knew of who he really was, since the profiles of every Kaidos generation was top secret.
You just thought Cello was a working man who's just stressed and it is what he told you. He heard of your idea and disagreed, and just like that he bought the whole land to reduce the rent fees and this does benefit you but it benefits the most to him.
If he ever thought of marrying you, if the world ever had a price he'd sign it under your name. Such a man inlove.
And so, life is weird but you ended up getting married to him. How? Life crisis. He never showed you his life of an assassin to keep you always safe and sound, but as the wife instincts grow you always find him suspicious in any ways.