I feel like that's not the actual brother. Either the brother is already dead or in another place. I think the ml right now is a magical creature that wanted to protect the actual brother when he fell off that cliff. And that is why IT IS OK TO SHIP THEM!
I wanna play the otome game to see how twisted it is. First the target was a yandere brother then a twisted sevant that's an M. And now a nercrophiliac! MAKE THIS GAME REAL ヾ(☆▽☆)
The best part is the last few pages (≧∀≦)