This story is set in a world where all people are males. The differences is that there are men who can give birth, brothers, and those that can’t. Brothers play the same role as women in our world with all the baggages associated in a patriarchal society in ancient China. The MC transmigrated from a zombie apocalyptic world into a brother’s body. This book is a story about his life with the ML, an orphan with a mysterious background.
The translation is really awful. Worst than a lot of machine translations. 
The interaction between the characters are engaging and there is a whole hell of a lot of face slapping that keeps you entertained if you are able to put up with the translations.