How to Keep Away the Heroine’s Older Brother Safe

Sinopsis

I accidentally reincarnated as a character from a 19+ reverse harem novel. The problem is that I became Roxana Agriche, the older sister of the sub-villain. And my damn father kidnapped the heroine’s brother. Now, the only thing left for me is to meet a terrible end from the vengeance of the heroine. But what if I can…