Ciel did not change his expression because of Mu Yixue's words. He just continued to stare at the young man.
That he was an asshole was actually obvious. He saluted him and Mu Yixue, but his gaze occasionally glanced at Mu Yixue's face and neck, even once glancing at her thigh. It seemed that he was mesmerized by her to the point of not being able to control himself.
When Ciel activated the power of the Eyes of Heaven to observe him, he found many kiss marks on his body, just hidden under his clothes.
Ciel needed no explanation to know that he was a high-level rogue, similar to him.
Of course, just because he was an asshole, that didn't mean Ciel would slap him, especially when he smiled at him.
Ciel also didn't think a bastard would be his enemy, it was possible that they could become good friends because of their similarities. The most important thing was not to cross the boundaries that should not be crossed.
