Mr. Saitou

Players control a salaryman who is hospitalized. There, he enters a fantastical alternate reality imagined by a boy and becomes a llamaworm, a combination of llama and worm. Besides a bizarre office life, he collects gemstones in a cave inhabited by various creatures. He does this by completing various puzzles.

It tells the story of Mr. Saitou, a middle-aged Japanese salaryman suffering from work and daily life due to constant overtime and social isolation. One day, he gets into an accident, being hospitalized in serious condition. He meets Brandon, a boy who likes to draw a species called Llamaworms and also makes friendship bracelets. He promptly names the Llamaworm he has drawn Saitou, then draws more, naming them all Saitou, apart from the one wider than the others, which named "Widetou".

After Brandon leaves, Mr. Saitou loses consciousness and wakes up in a meeting room surrounded by co-workers and his boss with a presentation to give. Also, he and everyone else is now a Llamaworm, realized that the real world was transformed into a strange magical land imagined by Brandon. After Saitou is out of bed, he collects seven metrics for his boss before turning in these metrics and going to an after-work drinks gathering despite very much not wanting to.

Mr. Saitou was released for Linux, macOS, and Windows on March 23, 2023. It is included in the deluxe version of Rakuen, which was released the same day.

PC Gamer called it "a bite-sized experience" compared to Rakuen but said it has "a soulful bittersweetness". RPGFan said that it "has heart and something to say", but they felt there was not enough interesting gameplay to recommend it. Rock Paper Shotgun called it "a wonderful, short RPG" that satirizes Japanese work life and identified it as one of their favorite games of 2023 as of July. Reviewing the deluxe version of Rakuen for the Switch, NintendoWorldReport said both games "deliver a delightfully charming experience".