You Said You’d Repay Me for Saving Your Life, Then You Left, and Now You’re Losing It

The groveling ex chases her after the breakup, but there's absolutely no getting back together. Face-slapping and putting scumbags in their place, a wealthy-family comeback, a business genius, a scumbag man and a scheming green tea, a family of parasites, satisfying revenge, angst before sweetness, one-on-one romance with both leads pure and devoted.