I loved the whole drama. And I am one of those, who r happy for the last happy ending scenes. :) But I got a little confused about the ending. I am rewatching it now and I got some explaining thoughts to the ending scene. 

1. Black/Joons existence got erased. But only the humans lost the memorys of him. The grim reapers keep the memories of black/Joon. Otherwise the reapers wouldn't know about former deleted reapers. Also Loser clearly remembers the promise with Black/Joon. 

2. Loser/Leo saves  Ha Rams parents from the car accident - > Ha Rams father didn't got possessed by reaper - > Ha Ram is normal human. 

Now my opinion on the last scene:

Joon is really gone. He got erased. So he never lived - > can't have a soul living in after - life. He is gone. But only the humans have lost the memory of him. 

So... at the end... through the power of Ha Rams true LOVE... she remembers him and all the moments they spent together. But if a human (ha ram) actually does remember Joon... could he really never existed? 

Do u all remember the end of Queen InHyuns man? It's pretty much alike. 

I think maybe her memorys brought Joon back. Not as a human because either Joon and Mo Gang r dead. Even in Ha Rams memory. And not as a grim reaper because in Ha Rams memory +what Leo had told her.. Joons body was found and he already got punishment as a grim reaper. So i think because there is a human, who holds memories of Joon, his soul is brought back. And the whole story through the drama is true again. Because he can't be not existing if a human knows about him. So at the end he picks up dead Ha Ram to the happy ever AFTER world :) 

And then a Titanic - like ending. Ha Rams soul is young again. And Joons soul is 'old' (not the child). He looks like Mo Gang because they r kinda brothers. Everyone said they look the same. So for the afterlife they got their forms back from that time, when their love bloomed. Since Ha Rams love brought him back. 

How does that sound? What do u think? :) 

Your explanation for the ending is probably the most satisfactory one and is logical even though the logic is clearly created to justify the happiest possible ending here. Your ending is as justifiable as the one which the writer was initially trying to portray and which got hijacked by the director.

1. Agree. That is the only way it makes sense and is logically implied and necessary for the reaper community as well to maintain some sort of history.

2. Yes, but I see no reason for the timeline to stretch till that point in the past if only Joon was to be removed. Still, that is the only way that new life of hers makes sense. She could not have died and have have been reborn based on Leo's age being similar at the end. Thus, her previous life was just edited to the least extent possible removing Joon.  Maybe, saving the parents was a wish grant to 444.

Also addressing the originally proposed ending where Black is just obliterated because:

(i). There was no reason for him not to reveal his reaper personality or his Joon soul to the girl who would probably be the most receptive of all to such a concept, especially since she got her talent from her reaper dad. Hiding this was pure masochism with no benefits. even Ha ram would have been better off knowing the facts.

(ii) There was no attempt at hiding or trying to achieve a solution to living a human self. He simply accepted his fate. I expect more from a hero who displayed resilience throughout.

(iii) If the killing of humans at the end at all was a factor in his fate, it was unnecessary and seemed to be deliberate suicide on his part. 

(iv) The rule of Black being unable to return initially because his fate was tied to his partner was incredibly weak. If that is the reason for a major plot device, we can definitely write our happy ending with logic in the most satisfying way without worrying why sadness is more natural.

(v) Finally, the laws of the reaper universe just seem arbitrary. it seems incredibly easy to get on the wrong side of the rules, incredibly easy to fall in love with a human, incredibly easy to change who or when someone is to die, and also incredibly easy to dodge the Death Squad. Based on all this, the enforcement of the dissipation penalty just seems forced. In fact, it seemed that relying on fate or the judgement of God is the worst alternative as the natural sequence of events without 444 would be incredibly unjust.   

To me, adding sadness in the drama at the end would be the more contrived alternative, added only for masochistic purposes. The director had differing opinions here and frankly I am gladder he changed it albeit with terrible execution and production values at the end.                     

Wow! Thanks for your reply! :)

Yeah...I got ur points...I think if u keep thinking About Black round and round u will find lot´s of more things that r logical or unlogical xD Thats propably the mystery about it xD

As u probably read already i´m addicted to happy endings. U can imagine how sad I was at the end of Black, because I really love the drama. So I was quite happy about the last few minutes. I know the director said he intended to end the drama at Blacks death. But the last happy end minutes r still there. I saw them. So to me they count and i´m happy about it. ;)

Thank u for sharing ur opinion ^-^ 

Thank you for sharing the logic on how Black returned. Haven't see it anywhere else. It is kind of like how I was theorizing after Nine or am theorizing in Alhambra.

I also like happy endings myself. There are enough unhappy ones in real life to worry about. i can stomach those taht are plain unlucky but contrived ones or misfortune brought around by rank stupidity really irritate me.

Hihi ^-^

Yeah I think so too... Life has enough tragedy already. Dramas r there for me to cheer me up not to pull me down ;) Kinda like that ~