Contradiction

Min Jun has a stubborn tokki with the natural sub's tendency that contradicts his independent personality. He knew his tokki's personality contradicted what he wanted for himself and their relationship. As a dom, it becomes Min Jun's responsibility to explain everything to his tokki. But he needed to figure out where or how to start the explanation. 

The fact that he needed to learn more about his tokki also plays a huge role. 

Young Jae was sheltered and protected by the Moon family - not out of love but due to some people's malicious intention to keep him naive and mint some gain later. They had succeeded to a great extent and even played him well before kicking him out of the family.

But when Young Jae was in the Moon family, he had always been a dependent person who followed his father and grandmother's wishes and whims. He listened to his grandfather quite often too.