옆방에 일본여자가 싼다 Cuevana Jae-kyung is embarrassed and runs away after seeing someone talking to herself at a bar. Did she live in her next room? Yuya and Jae-kyung, who are free from misunderstanding, are rapidly approaching. Soon, they will develop into a relationship with each other. However, the new relationship at the boarding house causes all relationships to break. To make matters worse, Jae-kyung misunderstood Yuya's appearance to share her concerns with Ken. Can their relationship be restored?