Prologue.
Dutch historian Johan Huizinga (1872-1945) released \"The Autumn of the Middle Ages\" in 1919, offering profound insights into the medieval era and shedding light on its dark times. 
With a deep understanding of language, Huizinga becomes captivated by play and devotes himself to the study of games within the course of history. 
The medieval period is a beautiful sunset that occurs as darkness descends, symbolized by sunsets and moonlight. 
Culture emerges from play as a bud of the Renaissance.
The ideal life rooted in the era of the red dusk consists of three paths. 
Firstly, it involves escaping from the mundane world, denying worldly pleasures absolutely.
Secondly, it involves striving to change the world, ardently desiring a transformed society.
Thirdly, it involves filling life with fantasy, living life as a game.