SEKAI no Oto Vol.1 (セカイノオト vol.1, SEKAI Note vol.1) is a UNIT IMAGE ALBUM (ユニットイメージアルバム) revealed at the Project SEKAI Creators Festa 2023. The album contains ten VIRTUAL SINGER songs commissioned for Project SEKAI that will be gradually added to the game starting from late August 2023. The album contains 5 cover images, one for each unit.
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