Xu Yi was certain the mole was already dead - he even saw his dead body and there was nobody living who could prove his innocence.
Ye Wanwan only made up her story in order to save his life.
So, Ye Wanwan also hadn't known whether he was wronged or not, yet she chose to believe him.
If she hadn't stepped in at that moment, both his legs would've been disabled and the entire Xu family would've been dragged into this with him.
Xu Yi stood there as straight as a stick. His gaze on Ye Wanwan became increasingly resolute and there was a distinct admiration deep in his eyes as he spoke, mouthing each word carefully: "Miss Wanwan, you're the future mistress of the household - these are my responsibilities!"
Hearing Xu Yi's reply, Ye Wanwan was quite taken aback.
Xu Yi sounds like… he actually acknowledges my status…