BFive
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It seems like he's quite indifferent to his women? He didn't even tell them about the possible threat in the sect. If the criminal was confident enough to do something within the sect, despite knowing the Sect Head was a very powerful individual, then it was certain that the criminal had a backing that was very likely also powerful.
Your story is actually good, but this whole incident is too sudden. MC hasn't even had time to learn much about his abilities.