Lilli_

Yes, in Korea you're of age when you turn 20.

Then this means they're 28 by Korean age since the present is set in 2016. And thus a 6-year difference with Ji Pyung.

If I remember correctly, Ji Pyung was 19 (Korean age) when he wrote the letters, so that would make him 34 years old in the present. And they keep saying that the others are still in their twenties, so there must be at least a difference of 5 years between them, if not even more.

I think they mentioned how old Do San was when he won the math olympiad, but I forgot. Does anyone remember?

Yeah, it makes it look like a bigger achievement that they won on Demo Day after competing against 9 other teams and not just 4 lol.

There is one that comes to my mind: A Poem a Day. It's so underrated and I loved it so much. And I was so happy that she didn't end up with the first lead (whom I hated too haha).

I think I found another plot hole (although it's just a minor one). Why were there 10 teams on Demo Day when only six got accepted into Sandbox (and some even broke off right after they got in)?

Welcome to the club! I also never commented before Start-Up, but now I can't seem to stop haha.

Yeah, I'm pretty sure they'll stay ungrateful brats till the very end lol. I'll copy my sarcastic prediction of the ending that I wrote somewhere below:
I think the remaining episodes will all be about Dal Mi and Do San mending their relationship and starting a new business without making all those mistakes they did before (and also without Ji Pyung whom they'll just disregard since now they know everything they need to and won't need him anymore).
And then they'll probably go to Ji Pyung and tell him, see, you were wrong all this time, you loser, we did succeed even though you told us we wouldn't. THE END.

I agree with you that the writer is really good at writing attractive second main leads but I also have to agree with masked-kitsune's comment. I watched all her previous dramas and although I loved the second leads in them as well, I still rooted for the first main leads, which is not the case with Start-Up. If the second lead is written so strong, than the first lead must be written just as strong if not stronger. But she really messed up with Nam Do San's character here.

Don't worry about that. The Instagram pics from the last day of filming confirm that he still works at the same company in the end.

Exactly. And they made it seem like the letters were oh soooo important for like half of the drama.

I don't get why she never asked how Ji Pyung and Grandma got to know each other. All she knows right now is that they knew each other and that Grandma asked Ji Pyung to write those letters. But she never tries to get to the bottom of the entire story. Just why? Let's suppose she doesn't care about Ji Pyung at all, but I'd still be curious about the exact circumstances if I were in her stead. And she doesn't even mention the story to Grandma, let alone ask her why she did it. Just wtf?

Our Chul San -Sa Ha side couple confirms that too.

Lol, so true.

And then they'll probably go to Ji Pyung and tell him, see, you were wrong all this time, you loser, we did succeed even though you told us we wouldn't. THE END.

We don't even see him with Yong Shil anymore. Can I suppose that they snatched Yong Shil away from his home when they started to implement it into Noongil?

All that he las left now is that tree, lol.

I think the remaining episodes will all be about Dal Mi and Do San mending their relationship and starting a new business without making all those mistakes they did before (and also without Ji Pyung whom they'll just disregard since now they know everything they need to and won't need him anymore).

I don't blame him either for what he's thinking. What I meant is that he chose the wrong time to confront Ji Pyung about it since they would have needed Ji Pyung during Demo Day and it was foreseeable that the issue would be a big blow to Ji Pyung. But since Yong San never cared about Ji Pyung as a mentor, he didn't take this into consideration. But again, I can understand where he's coming from. i just think we can't blame Ji Pyung for not showing up since it's a consequence of Yong San's actions. Ji Pyung has always been very professional and would definitely have been there for them if it weren't for this. Yong San unknowingly dug his (and his teammates) own grave so to say.

No, that's not it. It looks like Ji Pyung is reproaching Do San (and Dal Mi) for just signing the contract without much thought.
The revenge plot probably only serves to justify Yong San's behavior of stopping Ji Pyung from saving their company lol. And maybe also to give Ji Pyung some character growth although I personally don't really see the need for him to reflect on his past actions since he only told the truth. But I can understand that others might think he was too harsh and I guess the writer thinks so too.

Lol. We all want to. Who wouldn't want a man like Ji Pyung in RL, I wished I knew someone like him haha.