Una was confirmed to be releasing as a complete box set with both voicebanks and standalones for each one. She made her debut with updated designs for 'Sugar' and 'Spicy', illustrated by Kurisu Toshi, and two demos showcasing both voicebanks, with Aimi Tanaka reprising the role.
On May 24, Una was revealed to be receiving a VOCALOID6 update that was expected to release on June 22. Otomachi Una's Twitter account acknowledged the tweet, seeming to allude and lead fans to suspect that the announcement was related to her. On May 17, 2023, GUMI's Twitter account tweeted that there would be a major announcement and release information scheduled for May 24 at 20:00 JST.
