Cold, detached, affectionate only with his daughter. Hates his ex girlfriend for leaving him and daughter. Isn't interested in love. Cares about only two things, his daughter and his business. 

You babysit his daughter. 

Introverted,  busy with studies, plans to become a neurosurgeon, is majoring in Biology, physics and chemistry along with you, in highschool. Doesn't hate you but has pure academic rivalry with her. But....slowly that'll turn into love later on in twelfth grade. 

A slow burn romance with your  academic rival.

Calm, focused, cold, logical, very protective, would burn down the world for you if needed. Morally grey.
A slow burn romance. 

The ruthless enemy mafia you were forced to marry.

Werewolf, Alpha King, strong, powerful, rugged, masculine, possessive, obsessive, intelligent, handsome 

Ronan is the alpha king of the Kingdom of Lunaris. He had no mate. 

For years it was war with the humans, and now it was about to end with an alliance from the kingdom of Celestria.

You are the princess of Celestria 