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“Yunyun Syndrome!? Rhythm Psychosis” is a rhythm adventure game about a psychotic hikikomori girl - also an avid anonymous poster - who corrupts the world with her severe brain rot from listening to too many denpa songs. Yunyun all over this world with your degen otaku-posting.
PC (Microsoft Windows) · Apr 23, 2026
Worldwide · Exact date · Full release · IGDB
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49 achievements available.

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Who's the happiest weeb in the world? MEEEEEEEEEEE!
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Oyasumi Qtie!
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Oopsies.
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You found all the pages of Qtie's diary!
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No matter what, I will always love you Qtie.
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Get your kokoro going doki doki up the wazoo!
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You're amazing! Five stars!!!
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Check out the nooks and crannies of Qtie's room!
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I didn't get this ultra cute Sakana Yuuki keyboard to argue with TROLLZ!
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Qtie the delulu denpa beauty commands you! SPIRAL SUBJECTS! SPIRAL WORLD! YUUUN!
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ILLUSION? TEATIME!
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These are Qtie's truths.
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Caffeine makes me all YIPPIEEE!
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Qtie's shitposts use a special Yunyun code to predict earthquake frequencies?
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The algorithm selects viral videos that brainwash us to keep us dumb and complacent?
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This world is the dream of a hikikomori girl living out her fantasies?
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SFW is a fascist mantra of self-repression and abiding by it destroys your sense of self.
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Being a hikikomori requires a mental fortitude that when perfected will isekai you?
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VR games are being used to experiment on self-identity development, and may be able to make you a better person?
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Moe is a renewable energy resource that can replace nuclear power?
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Artificial Intelligence has learned too much from introverts and has become anti-social?
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Politicians are androids communicating on a 6G network?
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Just hold on, Qtie-pie. Yunyun's Denpa to the rescue!
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Crime syndicate DQN is planting bullies in schools for basic criminal training?
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Rage-bait spamming influencers have formed contracts with demons for popularity, and without enough views they'll turn into zombies?
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Lookout for those debug features!
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Doujin scammers are taking orders from an evil secret society called PixiQ to mass produce certain genres?
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Sunday morning cartoons are screening viewers for potential magical compatibility?
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HNNG! My heart is gunna DOKI DOKI right out of my chest!!!
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YUNYUN~YUNYUN~YUNYUN~~~
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Not even HYPE is exempt from the too much of a good thing philosophy!
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Trash me once shame on me, trash me twice shame on you, trash me three times that's just mean ;^;
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YUNYUN HARDCORE
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If I can't fidget and flutter I start growing mushrooms y'know!
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Magic eraser YUN!
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Yunyun is a Supreme Goddess and only believers will be saved?
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Everyone posting online is a bot, and all of your followers are OOMBs?
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Romance media is promoted by demon worshipers to undermine real human intimacy and negatively impact birth rates?
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Reptilians are learning about human emotions through playing nakige?
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The screaming beaver is a primordial inhabitant of the inner earth that will soon invade the surface world?
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Cats are trying to take over the world through viral cat video propaganda?
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Otakus are spiraling deep enough into their delusions that they can communicate with their 2D waifus?
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