For those interested in or theorizing about timelines, I put this together from the MBC official site.  [Historical note:  The Joseon Dynasty/Korean Empire ceased to exist in 1910 when the Japanese annexed Korea and the monarchy was abolished.  In 1945, the Japanese colonial rule ended with the end of WWII.  South Korea was officially established as a sovereign nation in 1948 and it adopted the “Constitution of the Republic of Korea” which vested legislative power in the National Assembly.]

The “Perfect Crown” Timeline

1945:  Constitutional Monarchy established.  The Monarchy is largely ceremonial and (presumably) laws are written by some sort of unnamed legislative body (but in current day South Korea, it would be the National Assembly)

31st Generation of the Joseon Dynasty

1995: King Hui Jong (Age 32) ascends throne

1999 (Sept.): Yi Hwan (Age 11) recognized as Crown Prince

2000 and 2009: Yi An’s title changed back and forth

2005: Queen died in auto accident

2010: Royal marriage between Crown Prince Yi Hwan and Yun Yi-Rang

2012: King Jui Jong dies from heart attack

32nd Generation

2012: Crown Prince Yi Hwan (Age 24) ascends the throne and becomes King Yi Hwan.

2018: Yi Yoon is born

2020: Yi Yoon (Age 3) recognized as Crown Prince

2022: King Yi Hwan dies in a fire

33rd Generation

2022 (March): Crown Prince Yi Yoon (age 5) becomes King

2022 (Sept.): Grand Prince Yi An is appointed regent.