夏日大作戰
Yasutaka Tsutsui's novel, "Gaspard in the Morning" (1992), is the story of an individual immersed in the virtual world of a massively multiplayer online game. The plots of isekai works such as ' (1997), "Digimon Adventure" (1999), ".hack" (2002), "Sword Art Online" (2002), "Summer Wars" (2009), "Accel World" (2009), "Ready Player One" (2011), "Jumanji" (2017) and ' (2021) also involve the virtual worlds of video games.