Remember the sister doesn't know he is adopted so she genuinely having s** with her bro
Comment by King Waldo on Isekai Koushoku Musou Roku - Chapter 6
2 Replies
@King Waldo she was literally the one who told him they weren't blood related? even though he already knew about it cuz previous knowledge and sh** but still
@King Waldo she the one who tell him they are not related by blood dude.read previous chapter again