Kim Junmyeon and Do Kyungsoo had been best buddies since forever. Their friendship ended and turned to a better relationship as Junmyeon asked the younger to be his man. A third wheel had never been a blissful appearance for any couple and so does these two cute couple. But unfortunately, it happened to them and worst! It seems like Kyungsoo had already taken a liking on this certain third wheel. What will happen to their relationship? Will it end just like that?