Former South Korean president Park Geun-hye, also the country's first female leader, was sentenced to 24 years in prison, with a fine of 18 billion Korean won, or 16.84 million US dollars, on Friday.

Park was found guilty of bribery, abuse of power and a series of other charges. She has refused to appear in any of her court proceedings.

File photo taken on May 23, 2017: South Korean ousted leader Park Geun-hye arrives at a court in Seoul, South Korea. /VCG Photo

The 66-year-old was ousted in March 2017, accused of leaking secret government documents to her close friend Choi Soon-sil. Choi, convicted of accepting bribes from the country's conglomerates including electronics giant Samsung and retail giant Lotte, had been sentenced to 20 years in jail.  

With Park sentenced, all 11 former South Korean presidents have suffered bleak endings. Many jokingly said, president of South Korea is the most dangerous job in the world. But seriously, what's behind their misfortune? Is there a Blue House curse falling on them?

Screenshot from Jean Hong's twitter handle. Hong is an assistant professor at Hong Kong University of Science and Technology with a focus on political economic incentives.

According to experts, there are three fundamental reasons behind their misfortune.

1. Politics mixed with other areas

Government officials collude with elites from business and academics field. 

2. Power monopoly

Family and friends of the top leaders abuse their power, or even meddle with state affairs for personal gain.

3. Severe opposition between parties

South Korea's main conservative party and liberal party are extremely polarized. 

Take a look at this clip summarizing all former South Korean presidents' not-so-happy endings.