ABC

He started for halmoni for repaying his debt but maybe later for (dalmi and halmoni ).

Yup,thats what I said,except letters nothing much.
With noongil,no one's knows what hjp did there,but we know what ds did.
For God sake ,noogil was ds creation atleast .if ds didn't created it ,there will be no noogil for hjp to save it lol.

He started doing them for halmoni unlike dosan.

Amazing things ...LMAO what are those amazing things he did for her.except letters nothing much.
You can say mentoring but it's his job.
Dalmi ,ds got into sandbox on their own.no hjp help .
Ds made dalmi ceo.without hjp
They got cheated in between.
Ds helps with virus attack.
Ds joins with dalmi for self driving car,then solar City.

Just my opinion,you won't accept mine,I won't accept yours .

In the finale episode, I commend how the director ends the story. All of the casts find their place in the business world. Dosan married Dalmi, and the team succeeded in their joined ventures. Scenes of them walking to stockholder’s meetings explained it well. And finally, settle the disagreement with Jip-Yeong. In-Jae realizes that she made the wrong choice, dissolved his adoption, and reunited with grandma. The bond between Jip-Yeong and grandma is a beautiful part of the story. He did not win Dalmi’s heart but gain grandma’s love and devotion that he will forever treasure. He also figured out how he will give back to grandma.

Dosan develops the Noon-Gil app to help Dalmi’s nearly blind grandma, supporting Dalmi’s idea to produce a self-driving car, the upgrade for Noon-gil’s App to help her grandma recognized the pills, and for retrieving files from a ransomware attack is all good gestures and an act of showing how he is devoted to Dalmi, that he will do everything to support her. This side of the story is indeed very selfless.

Comparing the two male lead actors. If I were in Dalmi’s shoes, I would choose Dosan. Why? Because his love is so genuine. From joining the sandbox to saving Dalmi’s company from ransomware, he always helps and supports her. He makes Dalmi’s ideas into reality. Dosan dreams are Dalmi’s dream. No question asks; he believes in Dalmi’s vision for the future. They compliment each other. On the other hand, Jip-Yeong is straightforward and harsh guy. He helps Dalmi not to get hurt because grandma asks him to. At first, he has no feelings for Dalmi. He was just being good to her to return the favor. It took him so long to admit that he has feelings for Dalmi, but he lost the chance. He suffers the consequences of his actions.

That's my wish bro,there is no rule that everyone should feel like you.stop complaining ,chill out.there is no need to attack me.

But,Dosan is male lead,remember that.

but you got it ri8 what i mean to say.

Yes, missing dalmi and dosan :( and the way they call each other ,dalmiaaa... dosanaaa..

I will only binge watch from now on and will never indulge in comment sections like this.LOL

If you don't care about that,then don't give a shit about the letters too..why are you giving so much importance to letters than,it's doesn't work like this..

He is not a perfect son,but I have seen even worse son characters than him.
Even hjp didn't even once tried to look for granny for 15 years after that back story,because you all seem to be too much connected with that story.
I think hjp is today where he is because of halmonis intial money which he used to invest .
It's just a drama..this much analysis is not required.this is not even a awards worthy drama to receive thisuch analysis,it's better if we stop here.

""This poor writing extends across to Do-San and I really feel sorry for Nam Joo-Hyuk. He’s a great actor and his performance through this drama has been fantastic per the script. The writing has really made him look like an awful person and if you look at his past it doesn’t paint him in a very favourable light.""

Writing is not top notch,but I am team dosan,so I am happy with ending atleast.

I am ok with this,But for hjp fans, the writer sholud have shown something better ,convincing about
1.why dalmi loved ds,instead of "because it's you"
2.should have ended this love triangle early atleast took it till last episodes.
But ,even with is negatives,I liked the drama.

THE ONLY THING THAT SAILED OFF WITHOUT A MAP WAS THE WRITING LMAO.

Who does Seon-ho think Dal-mi should end up with?
In a recent interview with The Swoon, the 34-year-old actor was asked what he would do if he were in the same situation as his Start-Up character. "I think I'd just be honest. If Ji-pyeong were honest with Dal-mi, would he by her side instead of Do-san? I don't think so. Do-san and Dal-mi are meant to be together," Seon-ho confessed while pretending to make a crying and laughing face.
https://www.pinkvilla.com/entertainment/kim-seon-ho-thinks-suzy-should-end-nam-joo-hyuk-start-do-san-dal-mi-are-meant-be-together-579866

Some watched it for main leads ,so they won't care about how injae nor hpj ended,because they love only MLs,they want see more screen time between main leads,and they are happy with that ending.thats how they are.

Then,I feel the opposite is true too.you are biased maybe ,some like this ,some don't.what ever may be the reason.dont call biased.