Jae Seok and Yi Kyung head to Japan to meet Eun Kyung. But with Yi Kyung's nonstop teasing and banter, it's shaping up to be another exhausting day for her. Despite his efforts, the conversation just doesn't click! Even Jae Seok's attempts to ease the tension can't rein in Yi Kyung's wild energy. Will Eun Kyung enjoy their visit or end up drained once again?