Why!???

This is so incomplete!! I hate the master so much, will the son never know the relationship master and his father had even when the wife was there, it feels like son only knows half truth and is onto his journey to get revenge for clan bs when those two were in love and f*cked each other like rabbits, he should at least know the reason about why master even considered giving him his heart in the first place as it was all because he resembled his father, look at those ending pictures, I'm in pain.........