Nae Mogeul Biteuneun Guwonja

Elaina, the illegitimate and disabled daughter of a noble family, lives in isolation and neglect. On the verge of being arranged in an unwanted marriage to an elderly marquis, she is approached by Sinclair, known as the "Monster Prince," who offers her a marriage contract. He asks her to remain by his side until he ascends to the throne. Despite his reputation, Sinclair is both affectionate and protective, showing unexpected concern for her. Over time, Elaina grows attached to him. However, she begins to wonder if Sinclair is actually Len, the childhood friend who was her first love and the one responsible for her injury. She questions whether he truly is Len.