One Song, One Life

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• Announcements·1 May 2026Official

  The Design Secrets Behind a “Life You Perform” Interview with Chamaji

  The Design Secrets Behind a “Life You Perform”Interview with Chamaji, Illustrator of One Song, One LifeOne Song, One Life is a new kind of rhythm adventure game where both the story and music branch based on the player’s performance.(If you’re not yet familiar with the game’s concept or appeal, be sure to check out our previous articles as well.)One of the most important elements of this title is its design.In particular, the still illustrations and character animations do more than simply express the game’s world—they serve as a direct emotional bridge to the player through visual storytelling.For this article, we spoke with Chamaji, the illustrator responsible for the game’s still illustrations and character animations.ChamajiIllustrator and manga artist. Active across a wide range of genres centered around character design and manga illustration. Especially skilled at creating illustrations that feel full of story and friendly, charming chibi-style characters, Chamaji’s art is both catchy and artistic.Official Website:https://chamaji.com/X (formerly Twitter):https://x.com/omemerenIn this interview, we dive into the thoughts and secrets Chamaji poured into the visuals of One Song, One Life.The Color Chamaji Brought to One Song, One LifeFirst, we asked Chamaji about their role in the project and the behind-the-scenes process of creating the game’s artwork.◆ What was your role in One Song, One Life?Chamaji: I was in charge of creating the still illustrations for each ending, the character animations and background art during gameplay, as well as UI assets.◆ What was your honest first impression when you saw the game system and world where both story and music branch?Chamaji: My honest reaction was that a “branching rhythm game” felt like something that should have existed already, yet somehow didn’t. It struck me as both exciting and fresh.When I also heard that the mood of the music changes depending on the route, I could really feel the composer’s dedication as we...
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• Announcements·24 Apr 2026Official

  “Perform a Life” — Interview with the Developers of One Song, One Life

  The Feelings of Just Two Creators Behind a Game Where You “Perform a Life” — Interview with the Developers of One Song, One LifeOne Song, One Life, scheduled for release in June 2026, is built around the concept of “a game where you perform a life.”(If you’re not yet familiar with the game’s appeal or premise, be sure to check out our previous article as well.)In this article, we focus on the two key figures behind the project and explore the question:How was the idea of “a story that branches through performance” born?A composer who connected music with gameplayA producer who shaped the life of a characterFrom these two very different perspectives, we’ll introduce the unique charm of this title.“Turning the Irreversibility of Life into a Musical Experience”Yudai Ota on His Commitment to the MusicAt the core of One Song, One Life is a system where the music itself changes depending on your performance choices.The person responsible for every track in the game is music producer, composer, and arranger Yudai Ota.Yudai OtaBorn in Nagano Prefecture. Since his student years, he has performed in numerous bands as a guitarist, bassist, and drummer, appearing on many music programs and large-scale events. Later, he expanded into lyric writing, composition, and arrangement, providing songs for many artists and projects. Today, he has gone beyond the role of composer and arranger, also working as a game director overseeing the structure and presentation of entire works, continuing to broaden his creative scope through music.https://love-annex.jp/creators/%E5%A4%AA%E7%94%B0%E9%9B%84%E5%A4%A7/Rather than functioning as simple background music, the music in this game acts as the player’s choices themselves. Here, Ota shares his thoughts as the composer behind it all.◆ How did the idea of “music that branches” in this game come about?Ota: The origin comes from my own love of live performances. Whenever I see a show where the transitions from one song to the next are especially cr...
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• Announcements·13 Mar 2026Official

  One Song, One Life: Rhythm ADV

  Can music change your life? "One Song, One Life" is a game where you "perform a life." Do you have an experience where you can say, "Music changed my life!"? Whether you have or haven't, "One Song, One Life" (OSOL) was created as a game we want everyone to "perform."In "One Song, One Life," you take the perspective of a third-party "Player," guiding Sumire—a young girl aspiring to be a net artist—through her journey with music. In other words, your performance will change Sumire's life.Here are the highlights of this title, which blends the thrill of a rhythm game with a branching adventure story.Guide Sumire, a Girl Aspiring to be a Net ArtistThe protagonist is 19-year-old Sumire Kirishima. We call her Sumire-chan. (We hope you'll come to love and root for "Sumire-chan" too!) Living in Tokyo, she one day watches a live video of her "Oshi" (favorite artist) and dreams of standing on that same stage. She begins her journey as a "net artist" (online singer). However, behind the world of dreams and admiration lie setbacks, temptations, and inner conflicts. Crucially, the Player is NOT Sumire herself. You exist as a presence by her side, guiding her by performing the music that defines her journey.It’s Not Just the Story That Branches in the Rhythm Game The core gameplay is a rhythm game where you tap notes in time with the music. *Images are from a work in progress. By successfully performing, players rack up scores and progress through stages. With intuitive and simple controls, the game is designed to be enjoyable for both rhythm game beginners and veterans alike.A major feature of this game is the presence of "Choice Notes" during the performance. *Images are from a work in progress. During a song, special "Choice Notes" will appear. Depending on which note you choose to play, Sumire's life (the story) will change. We invite you to perform the many different lives Sumire might lead. *Images are from a work in progress. And it’s not just the story that branches—the m...
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