Darling, Is It All CoincidenceEpisode 4

Jeong Ha-yun's life hit rock bottom—her brother was bankrupt and seriously ill. Just as she was being humiliated at her part-time job, she ran into Lee Jun-hyeok, a chaebol heir. Desperate for her brother's treatment money, she agreed to sell him her first night. But all he saw was a woman selling herself for cash. He had no idea she'd had a crush on him since their school days.