Minako Kotobuki (Asuka Tanaka in Sound! Euphonium ) and Ayahi Takagaki (Lisbeth in Sword Art Online ), who have both been actively pursuing their careers as voice actors and as solo artists, will celebrate the 15th anniversary of their solo debuts together in 2025. Kotobuki released her first solo single "Shiny+" in September 2010, While Takagaki made her solo artist debut with "Kimi ga Iru Basho" in July 2010. They have also been active as members of voice actor unit sphere , alongside Haruka Tomatsu and Aki Toyosaki. To commemorate this milestone, they will release their first collaboration single "Beyond Days" on November 12, 2025. In addition to the duet version by the two, the single also includes the solo versions of the song sung by each. The song is composed by Junpei Fujita of Elements Garden, who has supported the two on numerous projects, with lyrics co-written by Kotobuki and Takagaki. The lyrics powerfully express their mutual respect and the shared determination to persevere through their 15-year journey as both voice actors and artists. Additionally, a jacket photo featuring a newly drawn illustration by Miku Masuda has been revealed. "Beyond Days" jacket Meanwhile, their joint concert to celebrate the 15th anniversary, titled "'LAWSON presents Kotobuki Minako x Ayahi Takagaki 15th Anniversary Live 2025 'With'," is scheduled to be held at Zepp Shinjuku in Tokyo twice (15:00 / 18:30) on November 13, 2025. RELATED: Voice Actor Unit Sphere to Release 15th Anniversary Single in November 2024 Source: Music Ray'n press release
