Sunbae and Yonhap are planning a trip to celebrate Yonhap's 100th birthday. Yonhap is very excited about the trip, but he is worried that he will not be able to take care of his parents. He tells Yonhap that they should all go together, but Yonhap says that it would be better to go abroad, since it would save money. He suggests that they all go on a double date, so that they will not have to stay together all the time. He says that they can have separate rooms at night, so they can all have a good time together. He also says that Yonhap was planning on going on a trip with his friend, but that he wanted to stay with Yonhap instead. He asks Yonhap to make up for him, and he agrees to do so.