Believing in Buddhism and holding beads is his disguise; revenge is his obsession.
The heroine is ordinary and insignificant. She has been tortured by life and has no hope at all.
The man who was supposed to live only for hatred, redeemed her who had nothing.
When the grudge was settled, he realized that while redeeming her, he could no longer let go of this mortal concern. (Male biased channel)
Concept: The male protagonist takes revenge as the main plot and falls in love with the female protagonist.