otetsu is a producer known for his creation of numerous complex rock songs, usually featuring Megurine Luka or GUMI. He channels and deepens their voice, and is very experienced in making them sound more realistic. His songs are often praised for the combination of the addictive melodies and lyrics which create a sense of madness and sorrow.
He has earned the title "Legendary Luka Master" in several of his works such as "Graduation" and "Noraneko". "Hoshikuzu Utopia" is his most well-known song.
He is also active as a utaite, and occasionally makes self-covers of his own works.
With over 70,000 views, despite it being called Chocolate, the song actually uses that as a metaphor for heroin. In this song, GUMI is a heroin addict who just can't get enough of it. Author's Comment: バレンタインだから気晴らしに作りました。 "I made it as a Valentine's Distraction."