Woojoo and his older stepbrother Hanbit have always been close, with Hanbit doting on his little brother as if he had known Woojoo from the very minute he was born. However, Woojoo has a little secret… Swearing to push his forbidden feelings away, Woojoo tries to behave like an innocent little brother in front of Hanbit, until one day, Woojoo suddenly manifests as an omega. Now, Woojoo is not the only one with a secret…