Broken glass and the copper tang of a bloodline shattered in one night. Lee Jiha stood in the wreckage of her family's massacre and made a choice no child should have to make. Survive. She buried her name, buried her face, buried the memory of her brother's last scream, and reinvented herself as a tool sharp enough to cut the people who killed him. Fifteen years later, Lee Jeha walks into the same nightmare wearing a different skin — a cold-eyed corporate operative hired by the very chaebol family that orchestrated the slaughter. She is not here for a paycheck. She is here to dismantle them from the inside.

The eldest son, Kwon Seojin, is a problem she did not budget for. He was supposed to be a footnote, a spoiled heir she could manipulate or sidestep. Instead, he is the one person in the family who looks at her and sees the cracks beneath the mask. He does not trust her. He does not like her. And still, he keeps stepping between her and the consequences she stops trying to avoid. Lee Jeha's revenge has no room for allies, let alone someone whose survival was never in her script. But regret is a luxury she has never been able to afford, and this chaebol house has debts older than her name. When the ledger finally balances, the question will not be whether she can walk away — but whether she can walk away alone.

Also known as: 후회는 사치인 너에게, Huhoeneun Sachiin Neoege, For You Who Cannot Regret, To You Who Regret Is a Luxury.