Brasia's question (4)

There are a lot of BL with this concept , but what about the other way around ?

Is there any manga or manhwa that embodies the concept of " untill the bitter end " , like mc and antagonist fighting each other dirtly untill the worst ending possible ?

is there like mangago ALPHA and OMEGA too ????
and this one is for us the ordinary non-spicy people !

Can someone enlighten me about the show , and is it only those 7 songs or there are more like actual lenthy episodes , what happened to round 4 ?