Minimum
- OS: Windows 10, 11 (64bit)
- Processor: Core™ i5-9400
- Memory: 8 GB RAM
- Graphics: GeForce® GTX 1050 Ti 4GB
- Storage: 3 GB available space
Platform
Steam
Region
Global
Global
Delivery
Instant key
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Standard / GLOBAL
Media
About this game
90%
Very Positive1 493 Steam reviews
Show more Show less
High and vibin’ with denpa songs, we’ll corrupt the entire Internet! Hehe. all we need is a bit of otaku love, that’s all.
This is a rhythm-adventure game where you play as a hikikomori (shut-in) girl who’s high on denpa songs. Become Yunyun-brained and lose all self-control to anonymously post on social media and destroy the world with your Yunyun brain rot.
Have a Doki-Doki experience with over 30 denpa songs and multiple endings.
Q. Why did she become a hikikomori?
Q. How does anonymous online posting lead to world destruction?
Q. Does a happy ending exist for a degenerate otaku?
The answers to those “Q” s lie at the convergence of insanity and denpa psychosis.
Now, put those headphones on and become ill with Yunyun Syndrome!? Rhythm Psychosis.
⚡ Anonymously post online and infect the whole world with Yunyun-brain!
Get high on denpa songs and spread your heartful psychosis to everyone else!
⚡Characters!
・Qtie (CV:Nanahira)
The main character. A hikikomori. She suffered too much irl that she’s become a little (very) fuzzy in the head. Her obsessive love for the fictional character “Yunyun” is for sure an illness. Her overly “high” state from overdosing denpa songs causes her to propagate Yunyun love. Will there really be a happy end for such a degenerate otaku?
・Yunyun (CV:Haruko Momoi)
A fictional character that loves Qtie. A very much angelic devil. She will speak to Qtie through the monitor screen. Whilst the truth is unknown, most likely, she is just a figment of Qtie's imagination. It’s joever for her.
⚡About DenpaSongs!
Q. What is a “denpa” song?
It is a genre of music that is intentionally strange and catchy. All playable songs in this game are denpa songs.
Many popular denpa songs such as “it’s a cherry kissing explosion” (Sakuranbo Kiss) and many more are featured!
▶Original Songs
1.Denpa-tic Imaginary Girl "Q"
2.Peak Ecstasy!! Rim de Lacent☆
3.YUNYUN HARDCORE
4.???
5.???
▶Licensed Songs
6.Achichi na Natsu no Monogatari
7.Change my Style~Anata gonomi no Watashi ni~
8.Cirno's Perfect Math Class
9.CosmicKING☆sens@tion!!!!!!!!
10.Dakko Shite Gyu!
11.Gacha Gacha Cute Figu@mate
12.INTERNET OVERDOSE
13.INTERNET YAMERO
14.Kanbu de Tomatte sugu Tokeru Kyoki no Udongein
15.Kyururun Kiss de Janbo♪♪
16.Love Cheat!
17.Marisa stole the precious thing
18.Mighty Heart ~Aru Hi no Kenka, Itsumo no Koigokoro~
19.Miko Miko Nurse - Ai no Theme
20.Nee,...shiyou yo!
21.PETTAN PETTAN TSURUPETTAN
22.Princess Brave!
23.Princess Bride!
24.Raspberry
25.sakuranbokissu~bakuhatsudamo~n~
26.Senno Sakushu Tora no Maki
27.Shukusei!! Loli Kami Requiem
28.summer is machine gun
29.true my heart
30.winter is machine gun
♥Listen up!
Do you like cute anime girls? Do you like strange and catchy denpa songs? Do you wish for the death of this ♡♡♡♡ed up world? Great! Add “Yunyun Syndrome!? Rhythm Psychosis” to your WishList and stay updated for release information and updates!
Game features
- Single-player
- Steam Achievements
- Steam Cloud
- Family Sharing
- Steam Leaderboards
System Requirements
Swipe
Recommended
- OS: OS: Windows 10, 11 (64bit)
- Storage: 3 GB available space
Player reviews
Show more Show less
Recommended· 25 Jun 2026
Fun rhythm game, great art style, terrible translation. Even if you don't understand a word of japanese, you can tell they're just making things up with the Zoomer slang. Luckily there's a few fan translations already...
Recommended· 23 Jul 2026
♥♥♥♥♥♥♥♥♥ i love this game. Please play it. while i have a few things i dislike (difficulties being to diverse between each other and text going off the text box) its still amazing omg the story? PEAK. art? holy ♥♥♥♥♥...
Recommended· 23 Jun 2026
♡ ᕱ⑅ᕱ ପ(„ • ༝ •„)ଓ ┏━∪∪━━━━━ this game is really fun and the mechanics of this game are rlly good ദ്ദി◝ ⩊ ◜ i still miss twinkle so im happy there are songs featuring choko, they were the most fun to playyy the s...
Not Recommended· 4 Jul 2026
Really bad inaccurate English translation that just seems like writer making it up, and all translations that are not EN/KR/CN are outsourced to AI-translation company. Sad!
Recommended· 22 Jul 2026
The note design in lower difficulties are quite reasonable and I get to enjoy the music while playing. Heard there are issues with English translation so played in Japanese. Really like the feature to export gifs f...
Recommended· 20 Jul 2026
Quite the strange game. The rhythm element is very fun, and he conspiracy theories are also pretty funny. Also lot of the journal entries about Qtie are very sad, and give a good picture of her life.
News
All news
a month ago
Patch Notes Ver. 1.1.0▶ Update to Ver. 1.1.0 · Expanded the sort and search features for “Songs” · Added a feature that allows note speed to be adjusted during rhythm game play · Added per-song audio sync adjustment, also known as local offset · Added more areas that can be controlled using
a month ago
100,000 copies sold!Total sales of the main game "Yunyun Syndrome!? Rhythm Psychosis" have surpassed 100,000 copies! To everyone who tuned in to our denpa. Thank you from the bottom of our hearts!
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Yunyun Syndrome!? Rhythm Psychosis - PC (Steam)
Standard / GLOBAL
$10.00
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$10.00
Regular price
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Yunyun Syndrome!? Rhythm Psychosis - PC (Steam)
$10.00
Sale price
$10.00
Regular price
About
High and vibin’ with denpa songs, we’ll corrupt the entire Internet! Hehe. all we need is a bit of otaku love, that’s all. This is a rhythm-adventure game where you play as a hikikomori (shut-in) girl who’s high on denpa songs. Become Yunyun-brained and lose all self-control to anonymously post on social media and destroy the world with your Yunyun brain rot. Have a Doki-Doki...
- Platform
- Steam (PC)
- Developer
- Alliance Arts, WHO YOU
- Publisher
- Alliance Arts
- Release date
- 23 Apr, 2026
- Languages
- Genres
- Adventure, Indie, Simulation
- Product type
- Digital key / activates on Steam
Supported languages
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Media
Description
High and vibin’ with denpa songs, we’ll corrupt the entire Internet! Hehe. all we need is a bit of otaku love, that’s all.
This is a rhythm-adventure game where you play as a hikikomori (shut-in) girl who’s high on denpa songs. Become Yunyun-brained and lose all self-control to anonymously post on social media and destroy the world with your Yunyun brain rot.
Have a Doki-Doki experience with over 30 denpa songs and multiple endings.
Q. Why did she become a hikikomori?
Q. How does anonymous online posting lead to world destruction?
Q. Does a happy ending exist for a degenerate otaku?
The answers to those “Q” s lie at the convergence of insanity and denpa psychosis.
Now, put those headphones on and become ill with Yunyun Syndrome!? Rhythm Psychosis.
⚡ Anonymously post online and infect the whole world with Yunyun-brain!
Get high on denpa songs and spread your heartful psychosis to everyone else!
⚡Characters!
・Qtie (CV:Nanahira)
The main character. A hikikomori. She suffered too much irl that she’s become a little (very) fuzzy in the head. Her obsessive love for the fictional character “Yunyun” is for sure an illness. Her overly “high” state from overdosing denpa songs causes her to propagate Yunyun love. Will there really be a happy end for such a degenerate otaku?
・Yunyun (CV:Haruko Momoi)
A fictional character that loves Qtie. A very much angelic devil. She will speak to Qtie through the monitor screen. Whilst the truth is unknown, most likely, she is just a figment of Qtie's imagination. It’s joever for her.
⚡About DenpaSongs!
Q. What is a “denpa” song?
It is a genre of music that is intentionally strange and catchy. All playable songs in this game are denpa songs.
Many popular denpa songs such as “it’s a cherry kissing explosion” (Sakuranbo Kiss) and many more are featured!
▶Original Songs
1.Denpa-tic Imaginary Girl "Q"
2.Peak Ecstasy!! Rim de Lacent☆
3.YUNYUN HARDCORE
4.???
5.???
▶Licensed Songs
6.Achichi na Natsu no Monogatari
7.Change my Style~Anata gonomi no Watashi ni~
8.Cirno's Perfect Math Class
9.CosmicKING☆sens@tion!!!!!!!!
10.Dakko Shite Gyu!
11.Gacha Gacha Cute Figu@mate
12.INTERNET OVERDOSE
13.INTERNET YAMERO
14.Kanbu de Tomatte sugu Tokeru Kyoki no Udongein
15.Kyururun Kiss de Janbo♪♪
16.Love Cheat!
17.Marisa stole the precious thing
18.Mighty Heart ~Aru Hi no Kenka, Itsumo no Koigokoro~
19.Miko Miko Nurse - Ai no Theme
20.Nee,...shiyou yo!
21.PETTAN PETTAN TSURUPETTAN
22.Princess Brave!
23.Princess Bride!
24.Raspberry
25.sakuranbokissu~bakuhatsudamo~n~
26.Senno Sakushu Tora no Maki
27.Shukusei!! Loli Kami Requiem
28.summer is machine gun
29.true my heart
30.winter is machine gun
♥Listen up!
Do you like cute anime girls? Do you like strange and catchy denpa songs? Do you wish for the death of this ♡♡♡♡ed up world? Great! Add “Yunyun Syndrome!? Rhythm Psychosis” to your WishList and stay updated for release information and updates!
Game features
- Single-player
- Steam Achievements
- Steam Cloud
- Family Sharing
- Steam Leaderboards
System Requirements
Minimum
- OS
- Windows 10, 11 (64bit)
- Processor
- Core™ i5-9400
- Memory
- 8 GB RAM
- Graphics
- GeForce® GTX 1050 Ti 4GB
- Storage
- 3 GB available space
Recommended
- OS
- OS: Windows 10, 11 (64bit)
- Storage
- 3 GB available space
News
a month ago
Patch Notes Ver. 1.1.0
▶ Update to Ver. 1.1.0 · Expanded the sort and search features for “Songs” · Added a feature that allows note speed to be adjusted during rhythm game play · Added per-song audio sync adjustment, also known as local offset · Added more areas that can be controlled using
a month ago
100,000 copies sold!
Total sales of the main game "Yunyun Syndrome!? Rhythm Psychosis" have surpassed 100,000 copies! To everyone who tuned in to our denpa. Thank you from the bottom of our hearts!
a month ago
Patch Notes Ver. 1.0.9
▶ Update to Ver. 1.0.9 · Adjusted special dialogue to play on the title screen on specific dates · Adjusted the HARDCORE GAMER and NORMAL ratings, which were internally identical, by unifying all ratings except DEGENERATE (NORMAL, HARDCORE GAMER, TRYHARD) and correcting
Best Reviews
👍 Recommended · Steam player · 25 Jun 2026
Fun rhythm game, great art style, terrible translation. Even if you don't understand a word of japanese, you can tell they're just making things up with the Zoomer slang. Luckily there's a few fan translations already so I'd recommend patching it.
29 found this helpful
👍 Recommended · Steam player · 23 Jun 2026
♡ ᕱ⑅ᕱ ପ(„ • ༝ •„)ଓ ┏━∪∪━━━━━ this game is really fun and the mechanics of this game are rlly good ദ്ദി◝ ⩊ ◜ i still miss twinkle so im happy there are songs featuring choko, they were the most fun to playyy the story of yunyun syndrome is really interesting, the graphics are also so cute! overall moe girls songs for life !! X3 i rate this game wafuu/10 ₍₍⚞(˶˃ ꒳ ˂˶)⚟⁾⁾ ┗━━━━━━━━
17 found this helpful
👎 Not Recommended · Steam player · 4 Jul 2026
Really bad inaccurate English translation that just seems like writer making it up, and all translations that are not EN/KR/CN are outsourced to AI-translation company. Sad!
7 found this helpful
Recent Reviews
👍 Recommended · Steam player · 23 Jul 2026
♥♥♥♥♥♥♥♥♥ i love this game. Please play it. while i have a few things i dislike (difficulties being to diverse between each other and text going off the text box) its still amazing omg the story? PEAK. art? holy ♥♥♥♥♥♥!! AWESOME!! OST? characters? dialog? gameplay!? PERFECT!!! PLEASE PLAY YUNYUN I LOVE YUNYUN!! YUNYUNILOVEYUN
0 found this helpful
👍 Recommended · Steam player · 22 Jul 2026
The note design in lower difficulties are quite reasonable and I get to enjoy the music while playing. Heard there are issues with English translation so played in Japanese. Really like the feature to export gifs for personal use. The artworks are excellent.
0 found this helpful
👍 Recommended · Steam player · 20 Jul 2026
Quite the strange game. The rhythm element is very fun, and he conspiracy theories are also pretty funny. Also lot of the journal entries about Qtie are very sad, and give a good picture of her life.
0 found this helpful