Review Detail of sennun in Obtaining 10x rewards! Reincarnated into a novel as a side-character!

I’m hesitant to keep reading because I hate brother-con stories and it looks like his sister might be the love interest 🤢🤢. He knows it’s a cruel world but he tries to insert his morality into everything which is disgusting, And it’s not really that good of a story, a naive MC who has a tsundre ice beauty sister that he knows as a demon but will try and make her love him and have a soft spot so he can make her avoid her “dark future” even tho he knows the clan will never change he still wants the best for his sister/love of his life who he met for 2 seconds. What a lovely fella he wants to safe the whole world like the mc of the original novel he is living in and like every damn webnovel nothing new.