It's Because...

Dr. Feng remained in a daze for a moment, unable to react as he watched the unexpected scene happening right in front of his eyes. 

Never in his wildest dream would he imagine that… the system and the virtual character he created with his own hands would develop such an… such an intimate relationship! He had naively thought that they were close brothers, but in the end, they turned out to be lovers?!

The shock was too much, he felt as if his three views were rapidly being destroyed and rebuilt in the span of seconds. 

After creating the virtual character 'Cyrus', Dr. Feng had only given it a mission to guide Zachary and Lu Yizhou inside the simulator. As for the level of authority it had, he had not applied too many restrictions because he assumed that the system would issue a warning once Cyrus acted out of line. He had foolishly trusted that there was no need for him to supervise their actions at all.