G-Mode to Publish Rhythm Adventure One Song, One Life, Demo Now on Steam
G-Mode, known for its Data East archives and indie publishing on Switch and PC, backing a branching rhythm game with over 20 songs signals a bet on narrative-driven music games as a growing indie subgenre.
Key Facts
- G-Mode announced on June 18, 2026 that it will publish and provide development support for One Song, One Life.
- The game is a rhythm adventure where players tap notes to music, and the type of notes hit causes the songs and story to branch, leading to multiple endings.
- A demo is available on Steam during Steam Next Fest, which runs until June 23, 2026.
- The full game is scheduled for release on PC via Steam in 2026, with over 20 songs and support for Japanese, English, and Simplified Chinese.
- Music production is handled by Yuta Ota, who has composed for Ensemble Stars!! and Cardfight!! Vanguard, and the producer is Takafumi Suda.
Reporting from 4 sources: GAME Watch (Impress), 4Gamer.net, Denfaminicogamer, Game Spark.
G-Mode announced on June 18, 2026 that it will handle publishing and development support for One Song, One Life, a rhythm adventure game planned by LOVE ANNEX and developed by C-Route. The game follows Sumire Kirishima, a 19-year-old aspiring net artist who wants to perform on the same stage as her favorite idol. Players tap notes to music, and the type of notes hit causes the songs and story to branch, leading to multiple endings. A demo is available during Steam Next Fest, which runs until June 23. The full game is scheduled for release on PC via Steam in 2026. A second promotional video was also released, showing gameplay and some of the over 20 included songs. The game supports Japanese, English, and Simplified Chinese. Music production is handled by Yuta Ota, and the producer is Takafumi Suda.
The game is a new project from LOVE ANNEX, a company that handles music production and creator management for anime and games. Yuta Ota, who has provided music for series including Ensemble Stars!! and Cardfight!! Vanguard, serves as composer and music producer. Producer Takafumi Suda, the representative of developer C-Route, previously worked on the horror game THREAT -SCREAM AND ESCAPE-, which uses microphone input.
Sumire Kirishima, the protagonist, is a 19-year-old living in Tokyo. Her parents are divorced, and she was raised by her father as a sheltered girl. The sources describe her as self-centered when pursuing her goals and lacking cooperativeness. Character design is by Tira, and in-game art is by Chamaji.
The game's branching system works through "choice notes" that appear on the lane. Selecting one changes the story and seamlessly transitions into a song matching the scenario. The press release frames the concept directly: "one song" represents "one life," and poor performance results in a game over. G-Mode president Seiichiro Kato confirmed the company is providing development support alongside publishing.
Synthesized by Yomimono from the 4 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.
Sources
- GAME Watch (Impress) ノーツの種類でルートが分岐するリズムADV「One Song, One Life」新PVが公開。デモ版が公開中
- 4Gamer.net ネットアーティストを目指す女の子の人生選択リズムADV「One Song, One Life」，パブリッシングをジー・モードが担当。Steamでは体験版も配信中
- Denfaminicogamer 最高のネットアーティストを目指す「スミレちゃん」の結末を演奏で決める、“人生選択”リズムゲーム『One Song, One Life』体験版が配信中。ジー・モードがパブリッシングを務めると発表
- Game Spark 病みながらネットアーティストを目指す女の子の人生を演奏で変えるリズムADV『One Song, One Life』最新デモ版公開。ジー・モードがパブリッシング担当