Son Anui Dangsinkke

Falsely accused through a shadowy adversary’s deliberate scheme, Dominic, the patriarch of house Winters, faces the imminent downfall of his entire family. As he struggles to find a way to save his family name, a secretive and highly dangerous proposal is made—one that demands his body as collateral...
(Source: Lezhin US)
Note: Part of Blühen's Hageukasang (하극상) Short Story Collection or Downfall Collection in English.