
No one's dying.

he's not even a 3rd party character

She's about 34 years old plus 70 the result is 104. There are even humans who can live up to 130 years and madness can prolong life ┑( ̄Д  ̄)┍. Why can't you see the point ?? If Sungji dies, Sumin will not give up because she still has Seju. Seju will never commit suicide and live happily ever after ┑( ̄Д  ̄)┍

That is where you are wrong. Sumin will never be happy with Seju. Just read the manga again and u will understand the reason why (which I seriously doubt u will). Your mind is already fixed that Sumin is meant for Seju. I wonder will you commit suicide if the author makes the ending become Sumin x Sungji.
I'm sensing that the ending MIGHT be tragic...
remember when the assassin said that she knows what Baek Seju mostly treasures/cherish/important to her..? It's no other than Sumin.. What if they'll use Sumin to get what they (a**hole brothers of Seju) to the point that they will kill Sumin, but then Sungji will be there to save Sumin.. (since Sungji loves Sumin unconditionally) then someone MIGHT die... ╥﹏╥ well it's just a theory. ╮( ̄▽ ̄)╭ I love this Manhua. More than I love myself ε=ε=(ノ≧∇≦)ノ