johnny6567

He was truly inspired by the samsung group of South Korea.
https://www.koreaherald.com/view.php?ud=20160720001007

take a read on the article to find more details about the founder and his kids etc.

Yes they get married. She is a judge in the novel not a prosecutor.

https://www.koreaboo.com/lists/9-korean-actors-actresses-declined-roles-in-popular-k-dramas-regret/

some famous kpop actors and actress who turned down spectacular roles either due to work schedule or not interested in it.

I think he thought that probably because the cheer squads in KNU and YU are quite famous among young and college students the show would be popular but instead it was a lame duck.

In the novel it was grandma but the chairman doesn't do anything and keeps quiet. He passes the company on to Do-Joon and he dies of old age. Remember the 1st episode of slush fund, it actually belongs to grandma and she does it with the help of her eldest son and grandson and Do-joon plots a move where an arrest warrant is issued immediately when she was out of country to visit her art museum (Slush fund source) and she would never be able to return back to Korea

In the novel it was grandma but the chairman doesn't do anything and keeps quiet. He passes the company on to Do-Joon and he dies of old age. Remember the 1st episode of slush fund, it actually belongs to grandma and she does it with the help of her eldest son and grandson and Do-joon plots a move where an arrest warrant is issued immediately when she was out of country to visit her art museum (Slush fund source) and she would never be able to return back to Korea

https://youtube.com/playlist?list=PLvQncUsI4TzLJQRxYTWB4RMzLqDdGRbub

The kdrama is not following the novel at all. Like core parts like he starts an investment company in NY, Hando Steel, Ajin Motors etc are all same. Seo-min young is a judge in the novel and not a prosecutor. She had no play between Miracle's Do-joon vs Sunyang Jin yang cheol . I was just stating what novel was like and spoiler is based on the novel. I have a feeling/guess its the 2nd Uncle's daughter who would be the final Villainess for this drama due to 1st episode where she ask Jin Sung Joon the eldest grandson for the slush fund in the restaurant and Hyun woo was killed for it in the 1st life.

She is a judge in the novel and she appears in 302 or 303.In the webnovel, She becomes a judge and while on a lunch break from an ongoing case at court he asks her to get married with him bluntly just like that. She asks him what is marriage according to him and he replies in a beautiful way" Making someone who is the 3rd important person to 2nd most important person in your life". She grabs him and goes to local government office and they register their marriage and she goes to back to court to finish the trial.
.
Novel ends on honeymoon in Malaysia where Oh Se-hyun who is retired and lives with his family, also one more cut is that both Do-Joon and his wife visits grandpa's tomb.

PS
Grandpa always wanted Do-Joon to marry Seo Min-young but he
didn't know that his grandpa had already asked for arrangement for her marriage with her parents. ((Seo Min-Young knew about that)

https://manhuaus.com/manga/the-chaebeols-youngest-son/

Its machine translated that means like google translate, if you try to read for the 1st time it will be difficult for you to understand.

https://comrademao.com/novel/the-youngest-son-of-sunyang/

I don't think so because you can his aunt begging the chairman on her knees to give some money. Since he has 30% shares in the department store and she postdated the check to next month rather than this month meaning it shows she paid but instead used the money to buy the stocks. So he can become an informant and tell the prosecution that he cannot see corruption in his department store that he has 30% shares in.

Do-joon's father was born from a fling chairman had with an actress, thats why grandfather was very angry with his youngest son marrying an actress because it reminded of his unfaithfulness. So i am not sure if the writers will follow the same back story as the novel " The youngest son of Sunyang".

The grandmother had killed the whole family in the 1st life of Hyun woo as the grandpa had become very fond of Do Joon and wanted him to inherit it. This infuriated grandma and she plots an accident which takes everyones lives ( But in Kdrama it is changed because we can see Hyun woo check the family chart but the 2nd son Do-joon is missing. Also we see his mother
comes and demands to know what really happened back then as she is become a minority
share holder of sunyang group and if you need her support they need to tell the truth)

Remember the money laundering scheme, it actually belongs to grandma where she had an
overseas museum and she launders the money from the sunyang. Both the eldest son and grandson knows about it and aid her in the scheme. After the demise of the grandfather, Do joon always comes to the
chairman house and remember the memories they both had. He comes aware about the slush fund after he gain control of the group and he plots a scheme where she is revealed to be embezzling the money from the company and an arrest warrant is issued but before that she moves abroad to avoid being jailed by the prosecution.
Finally he marries our FL and grandpa always wanted him to marry Seo Min-young but he
didn't know that his grandpa had already asked for arrangement for marriage to her parents. Its a happy ending with them in honeymoon in Malaysia and visiting grandpa's grave etc

From the webnovel.

The grandmother had killed the whole family in the 1st life of Hyun woo as the grandpa had become very fond of Do Joon and wanted him to inherit it. This infuriated grandma and she plots an accident which takes everyones lives ( But in Kdrama it is changed because we can see Hyun woo check the family chart but the 2nd son Do-joon is missing. Also we see his mother
comes and demands to know what really happened back then as she is become a minority
share holder of sunyang group and if you need her support they need to tell the truth)

Remember the money laundering scheme, it actually belongs to grandma where she had an
overseas museum and she launders the money from the sunyang. Both the eldest son and grandson knows and aid her in the scheme . After the demise of the grandfather, Do joon always comes to the
chairman house and remember the memories they both had. He becomes aware about the slush fund after he gain control of the group and he plots a scheme where she is revealed to be embezzling the money from the company and an arrest warrant is issued but before that she moves abroad to avoid being jailed by the prosecution.
Finally he marries our FL and grandpa always wanted him to marry Seo Min-young but he
didn't know that his grandpa had already asked for arrangement for marriage to her parents. Its a happy ending with them in honeymoon in Malaysia and visiting grandpa's grave etc

This is the webnovel story

Hyun-woo was killed by the same person who send him to the country to get money thats was embezzled. When in the 1st episode Do-joon's mother come and ask them to tell the truth about the accident. It is because he died in an accident orchestrated by the grandmother. Do-joon's father was born from a fling chairman had with an actress, thats why grandfather was very angry with his youngest son marrying an actress because it reminded of his unfaithfulness. So i am not sure if the writers will follow the same back story as the novel " The youngest son of Sunyang".

she came to ask them about the accident not where her son is?? the truth about the accident where her son died.

I believe Song Joong ki rejected this role because it clashed with his Reborn Rich filming schedule. But by the way Reborn Rich made it in top 5 most watched cable drama ever and 8 more episodes to go. It looks like JTBC is trying very hard to make their kdramas top 3 ever.

I thought it was a better ending

Yes, the character has been already introduced.