If you’ve ever wanted to doom the world through anime song-fueled online posting, Yunyun Syndrome!? Rhythm Psychosis might be your new favorite game. Developed by WHO YOU and published by Alliance Arts, this unhinged rhythm adventure launches on Steam on October 30, 2025. It’s aggressively weird, violently pink, and swimming in denpa energy.
Become Yunyun-brained and Post Like the World Depends on It
In Yunyun Syndrome!? Rhythm Psychosis, you play as Qtie, a psychotic hikikomori girl whose love for the fictional anime character Yunyun has turned into a full-blown illness. Her days are spent listening to infectious denpa songs, scrolling through social media, and, eventually, posting so hard she begins to corrupt reality itself.
That’s right — you’ll spread your Yunyun delusions by rhythmically blasting social platforms with psychotic otaku energy.
- Scroll your feed to check on your cult of followers and haters
- Hit notes in time with chaotic, hyper-catchy denpa tracks
- Post at peak moments to infect others with your brain rot
- Watch as your posts spiral the world deeper into Yunyun-ified madness
30+ Denpa Songs and a Terminal Case of Otaku Delusion
With over 30 playable tracks, Yunyun Syndrome delivers a steady drip of denpa bangers — including fan-favorite tracks like “Sakuranbo Kiss” (It’s a Cherry Kissing Explosion) and more. These songs aren’t just earworms — they’re weapons, each one fueling Qtie’s descent into rhythmic psychosis.
The game also features multiple endings, depending on how far you fall into Qtie’s delusional Yunyun cult. Is there a happy ending for a degenerate otaku, or is it simply joever?
Meet the Terminally Online Cast
- Qtie – A hikikomori shut-in with no grip on reality and a dangerous obsession with a fictional anime girl. Her life revolves around denpa, memes, and spiraling into chaos.
- Yunyun – A digital angel-devil born from Qtie’s imagination. She’s probably not real, but that won’t stop her from talking through your screen like a corrupted Vocaloid version of God.
Denpa 101: What Even Is This Music?
If you’ve never heard of denpa, it’s the soundtrack to losing your mind. It’s hyperactive, intentionally bizarre, and usually filled with sugary vocals, chaotic rhythms, and lyrics that make you feel like you’re about to transcend into a magical girl fever dream.
If that sounds appealing, Yunyun Syndrome!? Rhythm Psychosis might be your spiritual awakening.
Yunyun Syndrome!? Rhythm Psychosis drops October 30 on Steam.
