Since many of you seemed to  like my comment, I thought I'd post it in the forum so that people who watch the series later on can perhaps benefit from it as well. Below,  you’ll find my personal interpretation of the show. If there are other interpretations or additions, feel free to add them :)

MAJOR SPOILER WARNING 

I would say the theme of the show is second chances.

Basically, it's about the following: Myung Ha (29 years old) impulsively decides to take his own life after his grandmother died, his girlfriend left him, he has no friends in life and his mother pretends she doesn't know him. Before he died, he wished he had someone who would stay by his side, support him and love him. (You see this part towards the end of the show, the shooting star scene, where you also see what happened in his ‘first life’)

The show begins with the aftermath of the wish. He's sitting in a bar (after he died) talking to fate (I assume). He's depressed about life, talks about how everything is pre-written by Fate and that you can't change anything no matter what happens. Fate (the author) asks him if he could make the story better if he had the chance, and tells him about the plans for a new game version where the player can make decisions and choose a path. (He sort of bets Myung Ha if he could come to a better ending if he were the player) Overall, I think this part of the series represents how some things in life are given (the game's mission), but how you can decide what to do with them.

Anyway, in the end, Myung Ha's main goal becomes to make Yeo Woon happy because he fell in love with him. He really wants Yeo Woon to be happy and after he tried so hard, thought the only way remaining would be to make Yeo Woon the author / main character (the first thing he writes: Yeo Woon, author). But this makes his own role in the story unnecessary and he himself and the memories of him are erased. Luckily, a few things remain and so he is later rediscovered and Yeo Woon finds his notes about the game (which Myung Ha used to write in the little book) and he finds the author's pen which he uses to wish Myung Ha a happy life (it's love, they just want happiness for the person they love 😭 ) Therefore, Myung Ha comes back to the world where he was still 19 and gets his second chance at a happy life ❤️ (His wish became true, Yeo Woon was the person supporting him til the end..)

(Please, don't mind my bad english..)

Thanks for it!
I personally didn't feel any issue to understand what was the plot, but apparently a lot of people were confused. Its great you made such a comprehensive text to the ones lost with the ending <3

Hi, I saw this in Gaga and the subs were not very good (as usual!) and I think I might have missed some important parts. So I didn't see anything about Myung Ha writing about turning Yeo Woon into the author/main character. When does this happen? Thanks.

Thank you so much for your explanation. Really great! It gave me a better perspective of something I already loved! I will miss this series. Beautiful! 10!

Thank you so much for the explanation. I had some minor issues understanding the game theme. I think the main reason was that i did not see Myung Ha writing Yeo Woon becoming the author, or well the subtitles were not totally correct anyway.

 JoRod:

Hi, I saw this in Gaga and the subs were not very good (as usual!) and I think I might have missed some important parts. So I didn't see anything about Myung Ha writing about turning Yeo Woon into the author/main character. When does this happen? Thanks.

Same. The copy that I watched was from Gaga and the subtitle is Make Yeo Woon happy. Where can we find the right subtitle?

now it makes sense, the subtitles didn't show that Myung Ha wrote Yeo Woon as author/MC, no wonder why many of us are confused.

I'm still confused though...

Why did Myung Ha randomly decide that the way to make Yeo Woon happy was to make him an Instagram account?

Also, where did that random stalker come from?

I’m not fluent in Korean at all, but I know a little bit. When Tae Myung Ha’s wish shows up, it says “차여운을 행복하게 해주세요” 

I know that 행복하게 means happy, so I’m pretty sure the subs most people got, “Make Cha Yeo Woon happy”  is correct, not “Make Cha Yeo Woon the author”

Not trying to be rude in any type of way with this correction, but his wish was to make him happy. I’m assuming the huge error was because Cha Yeon Woon represented himself, as said by the author/fate guy he was talking to. (Which confusion lies with me on if CYW was supposed to represent TMH, & TMH comes back to his real life, how does CYW still exist?) 

There are still definitely some things I don’t completely grasp but it’s a very amazing series nonetheless. It’s about second chances & making yourself happy. 

 johnkneebravo:

I'm still confused though...

Why did Myung Ha randomly decide that the way to make Yeo Woon happy was to make him an Instagram account?

Also, where did that random stalker come from?

Myung Ha got the secondary mission to help Yeo Woon amass a big following  on Insta in correspondence to one of his answers to the question, "What's crucial to a happy life?" being "Someone who understands me."

I interpret this as somewhat of a way for Yeo Woon to connect more with Myung Ha since the latter already had a substantial following. Yeo Woon also had fans before his online presence debut, but as we could expect from this generation, everything and everyone worth our time needs to be on social media. The stalker, sadly, is an issue far from being fictional. An online personality without a stalker is quite rare. Some may just be secretive and, fortunately, choose never to interfere with the person they're obsessing on, while others are like the random stalker as portrayed in this series.

More concisely, people know Yeo Woon = opportunities to make life more exciting and bountiful. This is what makes a lot of people happy these days.