Actor Lee Si Eon: Why did he object to Seo In Gook being cast in ”Reply 1997”? ... Behind-the-scenes story revealed after 12 years

The "97 Trio" Seo In Guk, Lee Si Eon, and Eun Ji Won have gathered. On the SBS show "Fortysomething Son's Growth Diary" that will be broadcast on the 22nd in Korea, they will be appearing as the main characters of the TV series "Reply 1997".
The drama depicts the main characters, Eun Ji Won, XLee Si Eon, and Seo In Guk, spending summer vacation together for the first time in 12 years.
Eun Ji Won, who is known as a "stay-at-home guy," has attracted everyone's attention by preparing a summer vacation for her younger brothers.
When the historic secret of the vacation spot prepared by Eun Ji Won was revealed, not only Lee Si Eon and Seo In Gook, but also the mothers in the studio were shocked.
Mothers commented on Eun Ji Won's unexpected choice of vacation, saying, "She's just like Eun Ji Won," and "She seems naive."
Eun Ji Won, Lee Si Eon, and Seo In Gook competed for the highest karaoke score with a medley of memorable songs, and everyone reminisced as the familiar songs came on.
Lee Si Eon surprised Tony An's mother by singing "HOT" and Eun Ji Won sang "Black Cat" from "Turbo".
Nero" and made Kim Jung Kook's mother look pleased.
The three who were excited were singing "The way this guy" by "SECHSKIES".
They came together with the song "Live." Everyone was impressed by the rapping and dancing skills of SECHSKIES' leader Eun Ji Won.
Meanwhile, Eun Ji Won revealed that before filming for the TV series "Reply 1997," I Si An was vehemently against casting Seo In Gook.
When I Si An said that she was against the casting because she "didn't like Seo In Guk's face," Seo In Guk immediately responded by saying that Lee Si Eon
He made the studio burst into laughter by revealing his embarrassing past. Attention is focused on what the behind-the-scenes story of "Reply 1997" is.
The three-man vacation scene of Eun Ji Won, XLee Si, Eon, XSeo and In Guk will be broadcast on Sunday the 22nd at 9:05 PM in Korea.
It will be revealed on the program "Growth Diary of a Son in His Forties" which will be broadcast on .