He broke free from the shackles that bound him for all these years, let go of the relations he had, and ran away from the responsibility that has become a burden to him. 
Boian did not have many expectations other than to live peacefully. 
What a pleasant dream? It's funny how a monster who should be crushing others dreams started to dream about peaceful life. 
He knew he couldn't live like normal humans. Living to old age with a loving wife and giving birth to a bunch of children was not possible for him anymore. He couldn't live in isolation either due to the food needed to maintain his Heart. The deeply rooted ideology and training he received in food consumption prevented him from doing so. 
He knew his very own existence did not allow him to live peacefully, yet he tried. But, everything changed when he met a strange girl in his peaceful way of living. A meeting that changed his expectations and pulled him back to the shackles, relations, and responsibility he tried to escape from but this time with no chance of escape. 
It was because, she gave him the fiercest stimulant that makes or breaks a man, 'Ambition.' 
He wanted to go back to where he was kicked out with his head high and beat the people who dared to look down on him. 
Even if it was the DEVIL himself. 
***************************** 
Author half asleep: Simply put. A poor fellow gets messed up real hard by a chick and gets thrown back into the good vs evil cliche war he tried to escape from. Whether the chick be a blessing to him or a burden to him forms the story. 
Tags: Adventure, Heavy romance [No cliche harem but there are affairs(pun intended)]. Also a lot of action later on. 
I am a newbie...So be gentle with me plz.. 

(KiBiBiK's note - I have changed the title and synopsis so apologies to early readers)