Jun Moxie would rarely ever be serious. But, anything he'd ever say in a serious manner would stand to represent a commitment. And, Guan Qinghan had understood this fact clearly by this time. However, it was the understanding of this point that had left her to feel increasingly scared.
Someone would've spat out a mouthful of saliva in contempt if he hadn't spoken those words with a serious look. However, no one could've done that in this instance!
[No one can ever change his decision. He had similarly vowed to protect me when faced with the Xue Hun Manor's threat. So, I'm sure he means it this time as well.]