C104 Vinegar 3

Su Nian was no longer a child. He had gone through the regular Omega estrus training, which was a compulsory course for every Omega. This was to allow Omega to protect him better, as well as to let them know what kind of preparations they had to make when they were about to enter estrus.

This course on Omega's estrus is not only something Omega can learn, but alpha can learn as well