It started with a meeting between an introverted boy named Yongguk and a bunny teeth boy named Himchan. They did not have a pleasant first impression on each other and Yongguk ended up making Himchan cry. But then his twin brother, Yongnam brought the boy back to their house and reintroduced them to each other. Despite having problems on hating Himchan's front teeth that reminded him of his dead pet bunnies, Yongguk let Himchan join him and his brother on their journey towards adultho