Guilt

"Then… then what will happen to Lele now?" Su Yu worriedly asked. He bit his lip and lowered his head, blaming himself. He has the power to protect Tang Lele, but due to a moment of distraction, he let the enemy strike at them which made Tang Lele fall into danger. And now, he doesn't even know how to save Tang Lele. 

Duan Yuan turned to look at Su Yu and he frowned when he saw his lover's face. Su Yu's expression is worried, and his eyes are filled with guilt. Duan Yuan rarely sees this kind of expression that his lover makes, and the hell doesn't want to see this on Su Yu. Because Su Yu is the only one who will be hurt. As for when did he see this kind of look on Su Yu… it was when Su Yu was framed by the enemies, especially that time with the Fujing Sect's destruction which was done by Su Yu himself.