What action did a Korean take on the day of mourning his fallen country that would never be understood in Korea?

On the 6th, South Korea celebrated Memorial Day, a day to commemorate martyrs and fallen soldiers, and a ceremony was held with the attendance of President Yoon Seok-yeol.
The Rising Sun Flag has been displayed at a condominium in Seoul, sparking controversy. In South Korea, the Rising Sun Flag is seen as a clear reminder of historical wounds in many countries, as it was the flag of the Japanese military used in the invasion of Asia during World War II.
The Rising Sun Flag is seen as a "political symbol." On the day when we mourn those who fought and sacrificed their lives for the country, the Rising Sun Flag is being hoisted, and Korean internet users are angry and astonished, asking, "Are you insane?"
The 6th is a national holiday called Memorial Day, and on this day every year a memorial service is held at the National Cemetery, which commemorates soldiers who died in the Korean War and the Vietnam War, as well as independence activists from the Japanese colonial period.
Sirens are sounded across South Korea, and the people observe a minute of silence to pay tribute to those who sacrificed their lives for their country. The Seoul National Cemetery, where the memorial service is held, is located on a site of about 150,000 square meters.
The cemetery is divided into seven areas: former heads of state, patriotic patriots, men of national merit, military personnel and the Military Academy, police officers, general public, and foreigners.
The Memorial Day ceremony was attended by family members of the deceased and political figures. President Yoon delivered a speech,
He commented that North Korea has been repeatedly engaging in provocative acts, such as sending balloons with garbage hanging from them into South Korea. "South Korea has become the brightest country in the world, but the area north of the armistice line is the darkest country in the world," he said.
"It has become a black land. Just 50 kilometers away from here, our compatriots have been cruelly deprived of their freedom and human rights and are living in hunger," he said. "The North Korean regime has rejected historical progress and is
"The government will never overlook the threat from the North," he said. President Yoon also spoke of his vision for nation-building, saying, "We will build a nation that leaps forward through challenge and innovation."
"We will build a stronger Korea, a country where people can live prosperously and happily, a country where young people are filled with dreams and hopes, and a country where the people are united and move forward together into the future," he said, adding, "This is the sacrifice and dedication of our heroes."
"I believe this is a way to remember the past and repay the great meaning of the event," he said. On this day, when patriotism was at its peak, residents of an apartment building in Busan raised the Rising Sun flag, sparking controversy.
Some see the Japanese flag as a symbol of Japanese imperialism, and many Koreans find it repulsive. On this day when we commemorate martyrs who lost their lives in the independence movement from Japan, why would they fly the Rising Sun flag?
The Korean people are expressing their indignation at the act of "infuriating" the Korean people. According to the Korean newspaper JoongAng Ilbo, on the same day, a message was posted on an online community titled "Busan Namcheong-dong (Namcheon-dong)".
The post was titled "Rising Sun Flag (war criminal flag) raised at an apartment building in Dong-do." The building was a complex of residential and commercial facilities, and the attached photo shows two rising sun flags hanging in the windows of the building.
According to Yonhap News, the resident who put up the flag is Korean. There have been many "Rising Sun Flag" incidents in Korea. Last month,
In a video of the Para Ice Hockey World Championships streamed by the International Paralympic Committee (IPC) on its official YouTube channel, a Japanese player was introduced with a caption along with the Rising Sun Flag logo.
The Korean Disabled Athletes Association protested to the IPC, claiming that the flag was used in the past. The Rising Sun Flag issue has escalated in recent years, with celebrities wearing clothes and companies advertising signboards being used in designs that "resemble the Rising Sun Flag."
Recently, a Korean living in Canada has been criticizing the packaging design of a new canned beer from a famous Vancouver beer company.
They claimed that the pattern of the Rising Sun Flag was used on the shirt, and protested to the company. The company apologized and was forced to change to a new design.
However, this time, Koreans themselves will raise the Rising Sun Flag, which is the exact opposite of the usual pattern.
Some people on the Internet have questioned whether the person in question is sane or not. However, there is no punitive law in Korea that deals with the Rising Sun Flag. The building's management office has received numerous calls of complaints.
The number of people flying the Rising Sun flag has been on the rise, but the office staff are unable to stop it and are struggling to deal with the situation.
"I spotted a vehicle bearing the rising sun flag," was the caption posted. In the photo, two rising sun flag stickers can be seen on the rear window of a luxury imported car.
If such actions were to occur one after another regarding the Rising Sun Flag, they would label it as a "war criminal flag" and express their displeasure.
Won't this lead to people finding out that this is inconsistent with their stance?