Radio Wave Song Rhythm Game "Yunyun Radio Syndrome" Launches Limited-Time Demo Featuring Over 10 Tracks
Note: the original Japanese article can be found at:
https://www.4gamer.net/games/802/G080235/20251010057/
Editorial Department: Igarashi | 2025/10/10 08:57 (UTC)
Alliance Arts today (October 10, 2025) has launched a limited-time demo version of its upcoming title, Yunyun Denpa Syndrom. The demo will be available until October 31.
This game puts players in the role of Q-chan (CV: Nanahira), a reclusive girl who spreads bizarre messages across the internet via radio songs, gradually driving the world into chaotic delirium. It’s a rhythm adventure game where you ride the waves of strange tunes.
In the demo version, players can experience both the rhythm gameplay section—featuring various radio songs—and the adventure segment, which includes playful interactions with Q-chan’s favorite 2D character, Yunyun (CV: Haruko Momoi), right from the opening moments of the story.
Thumbnail image for Gallery No.002 / Limited-time demo of the radio song rhythm game “Yunyun Denpa Syndrom,” featuring over 10 tracks Thumbnail image for Gallery No.003 / Limited-time demo of the radio song rhythm game “Yunyun Denpa Syndrom,” featuring over 10 tracks
The rhythm gameplay features more than ten tracks from the game’s planned soundtrack, including hidden songs. Although the story does not progress in the demo, you can continue playing after completing the demo content.
Additionally, starting today and continuing for five consecutive days, a karaoke-style preview video of each recorded radio song will be released at 9 PM every night. The first release features “True My Heart,” famously known from “Kishimen.”
Radio Songs × Bizarre Messages × Rhythm Game
“Yunyun Denpa Syndrom” Limited-Time Demo Now Available!
Officially Selected for Steam Next Fest & Radio Song Preview Videos Released Today
Alliance Arts Co., Ltd. has today, October 10, 2025, released a limited-time demo version of its upcoming rhythm adventure game Yunyun Denpa Syndrom, where players send bizarre messages across the internet via radio songs.
The demo will also be showcased at Steam Next Fest, scheduled to run from October 14. Take this chance to experience “Yunyun’s Radio Waves” firsthand.
Furthermore, starting today and continuing for five days, we’ll release karaoke-style preview videos of each recorded song every night at 9 PM on our official YouTube channel. Don’t forget to subscribe and stay tuned!
Demo Page: https://store.steampowered.com/app/4074930/_Demo/
YouTube: https://www.youtube.com/@AllianceArtsOfficial
About the Demo Version
The demo includes approximately 30 minutes of gameplay, starting from the game’s opening scene. Players can experience both rhythm and adventure segments in a loop.
Although the story does not progress in the demo, you can continue playing even after completing the demo content. The full version will feature full Japanese voice acting for Q-chan (CV: Nanahira) and Yunyun (CV: Haruko Momoi), but some voice lines are currently unrecorded in this demo—please note that.
Additionally, more than ten tracks—including hidden songs—are available to enjoy in the demo. The demo is scheduled to be available from October 10 through October 31. Play it now and experience “Yunyun’s Radio Waves” for yourself!
Demo Page: https://store.steampowered.com/app/4074930/_Demo/
Starting Today: Karaoke-Style Preview Videos of Recorded Songs
All songs in Yunyun Denpa Syndrom are radio songs. From today through five consecutive days, we’ll release karaoke-style preview videos every night at 9 PM. The first video features a legendary hit—“True My Heart,” famously known from “Kishimen.” Enjoy it alongside the demo.
Subscribe to our YouTube channel here: https://www.youtube.com/@AllianceArtsOfficial
Game Information
[What is “Yunyun Denpa Syndrom”?]
Yunyun Denpa Syndrom is a rhythm adventure game blending music and bizarre messages. It follows Q-chan, a reclusive girl who uses radio songs to post strange messages online, gradually driving the world into chaotic delirium.
Theme Song & Opening Video: https://youtu.be/Wu4tMwXmwj0?si=AcfyrUF95I7gvV20
[Dark Pop Worldview & Multiple Endings]
The protagonist is Q-chan, a reclusive girl whose mind has spun out of control due to the pain of reality. A devoted fan of 2D characters, she rides radio songs and unleashes chaotic messages that break the world.
Q: Why did this girl become a shut-in?
Q: How does sending bizarre messages drive the world mad?
Q: Can an underdog otaku like her even reach a happy ending?
The answers to these “Q”s lie at the edge of frenzied radio waves and madness. Experience heart-pounding thrills and ecstasy with over 30 radio songs and multiple endings.
[All Playable Songs Are “Radio Songs”]
Every song in Yunyun Denpa Syndrom is a radio song, featuring popular tracks such as “Sakuranbo Kiss ~Explosion da mo~n~,” “Miko Nurse – Theme of Love,” and “Stuck at the Affected Area and Melting Immediately ~The Mad Udenkai Garden.” Many fan-favorite radio songs are included.
[Characters]
Q-chan (CV: Nanahira): The protagonist. A reclusive girl whose mind has spun out due to the unbearable reality of life. She is utterly obsessed with a 2D character named Yunyun. Using her brain high on radio songs, she floods the internet with affectionate and bizarre messages filled with love for Yunyun.
Yunyun (CV: Haruko Momoi): Q-chan’s favorite 2D character. She speaks to Q-chan through the monitor, appearing like an angelic demon. Whether she truly exists remains unclear—perhaps she only lives within Q-chan’s imagination?
Messages overflowing with love for Yunyun will eventually drive the world into madness. What fate awaits this story of thrilling radio waves? Keep an eye out for updates, and don’t forget to add Yunyun Denpa Syndrom to your Steam wishlist.
Steam: https://store.steampowered.com/app/2914150/
↑ Please add it to your wishlist!