PuRplE
The combination of "High IQ" and being a millionaire while simultaneously being in the special forces and having a perfect body and face is cringy and makes my eyes roll but I guess at the very least there isn't a harem as far as I can tell so ill continue reading, but chill on making your character perfect in every way there is a saying of "Less is more" I feel like the first two chapters would have been better if you dropped the high IQ comment and the millionaire comment because the combination between those two along with the perfect appearance and special military background while also being young makes the main character feel alien and unrelatable, had you made him a lot older and changed the brother-sister into a father-daughter type of relationship I feel that would have made it far more believable and would have made the mc more likable and given the novel a stronger start.