Room.4

Kim Yeo-joo, a member of arguably Korea's top girl group, and Byun Baek-hyun, CEO of a major corporation. The Luminous, a luxury hotel owned by Byun Baek-hyun, and the girl group "Moonrise," which Yeo-joo is a part of, are attending an event there. What happened when they met in Baek-hyun's room, Room No. 4?