[9] During his one year of high school, he got to know Vocaloid music through his friends, while his father bought him DAW software, including Cubase.
This encounter started a years-long partnership between them, beginning with M.B drawing the artwork for "Mikansei Time Limiter", a song published in February 2014.
In April 2014, Orangestar left his Japanese high school and moved to Utah with his family in order to study English.
[7] During the summer of 2014, Orangestar posted "Earphones and a Chorus of Cicadas" (イヤホンと蝉時雨, Iyahon to Semishigure) and "Night Sky Patrol of Tomorrow" (ja:アスノヨゾラ哨戒班, Asu no Yozora Shōkaihan), both of which gained attention.
[3] In April 2015, Orangestar released his first album Unfinished Eight Beats (ja:未完成エイトビーツ, Mikansei Eito Bītsu), which ranked 45th in Japan on Oricon's weekly chart.
[4] In 2016, in addition to publishing several songs online, Orangestar composed "Imagined Mirage" (心象蜃気楼, Shinshō Shinkirō) for Chunithm, an arcade rhythm game.
[14][15] In August 2017, after releasing the song "Good Weather" (快晴, Kaisei) as a part of Hatsune Miku's 10-year anniversary album Re:Start, Orangestar stopped his musical activities and moved to Riverside, California to become a Mormon missionary.
[17][18][19] Kase had written the lyrics, drawn the illustration, and sung the vocals for Orangestar's April 2020 song "Sunflower".
[20] Besides continued online presence, Orangestar has written songs for rhythm games, anime, and promotional videos.
commissioned Orangestar to write an original for the mobile game, resulting in the creation of "Awaiting Clear Skies" (霽れを待つ, Hare o Matsu).
[23] Orangestar also wrote the song "Surges" for a 2021 promotional video of CalorieMate, an energy bar brand made by Otsuka Pharmaceutical.
[4][26] Besides summer, other recurring themes in Orangestar's lyrics include pianos, stars, seas, melancholy, and loneliness.
[4] He usually features simple tones and musical arrangements and most frequently uses pianos and synthesizers, though guitars sometimes make an appearance in his songs as well.