Su Yu and Duan Yuan are unaware, especially Su Yu, that they are going to have CP fans. But, even if they do (aware), they don't have time to worry (?) about it since their situation is not good.
Duan Yuan heard the concern in Su Yu's voice and his Adam's apple moved. "… it's nothing." He answered and turned away, schooling his expression.
Su Yu. "…" it doesn't look like it is nothing! He thought as he stared at the other. "You… were you - ?" he asked in a low voice. Then, he stopped. He doesn't feel any foreign aura in Duan Yuan so the other should not be possessed. Then, why did Duan Yuan have that expression earlier? What is he angry at?