Details: Originally uploaded to Nico Nico Douga in 2013, this track quickly took the Vocaloid scene by storm. Even today, it remains beloved by countless listeners and continues to influence a wide range of creators. The B-side includes rare versions as well as a newly produced '2025 New Recording. ' The jacket features artwork by 456 (Shigoro), the visual artist responsible for the striking imagery in the music video. 'Refine' is the version previously included in the compilation 'EXIT TUNES PRESENTS Vocalofuture' (QWCE-0031020 / released November 6, 2013). '2015 Depressed ver. ' is a remix by Neru himself, originally produced as a Tower Records bonus track for the album 'My Name is Love Song. ' '2021 Another One ver. ' is an alternate arrangement created specifically for the music program 'Yako Ongaku' during Neru's appearance. LISTEN: https://youtu. Be/8oBV3jPTW4s Tracklist: [Side A] 01. Lost One no Goukoku 02. Lost One no Goukoku (Refine) 03. Lost One no Goukoku (Instrumental) [Side B] 01. Lost One no Goukoku (2015 Depressed ver. ) 02. Lost One no Goukoku (2021 Another One ver. ) 03. Lost One no Goukoku (2025 New Recording)