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I cant really remember how this story goes, but it's something like this, mc either transmigrate into a novel or rebirth, he know the future, then there were dungeons, the original him is a douchebag who is soo weak, his dad makes all siblings fights but somewhat prefer him becoz the dad loves mc's mom, siblings are somewhat from different mom, there is this lunatic red hair villain

The oldest sis seems to be wearing a mask and kinda a cop(?). There also ML who is a genius.

Goshhh, I can't remember this manhwa name, helppp ╥﹏╥