This could’ve been a great concept for a psychological thriller manga. The scorned brother out for revenge on two sisters by playing with their love for him. Toying with their minds he weaves a path of shame and hate. While he himself is only driven by a false idea of reality he gets entangled with the repenting younger sister, falling for her and having his whole plan crashing down on him. What will it be? Revenge for his coma stricken sister or the love of a sinning sister?
It would be cool if he was like an older brothee figure who helps her along the way of finding herself, but its a romanceee soooo yeah no