Si Yuchen never intended to explain himself, even when Gu Xiaonuan suspected him.
Si Yuchen wouldn't make any explanations for things he hadn't done, not having done something meant just that.
If Gu Xiaonuan suspected Zhu Yawen was killed by him, then it could only be said that her imagination was too rich.
For Si Yuchen, killing Zhu Yawen would have had no benefits.
Gu Xiaonuan would be the first to suspect him, and she would use this as an excuse to give Si Yuchen the cold shoulder.
Si Yuchen found Gu Xiaonuan to be a very difficult woman to understand, her thoughts and ideas always eluding his grasp.
So, Zhu Yawen's death had no benefits for Si Yuchen, at most it was just a relief. Since Si Yuchen had agreed to drop the charges against Gu Xiaonuan, it also meant he wouldn't do anything about Zhu Yawen's problem anymore.
Zhu Yawen could live or die by his fate, because no one would pay him any attention.
