Originally a user on the popular japanese video sharing site called Nico Nico Douga, Limone-Sensei is famous for being an exact vocal copy of the voice actor Hiroshi Kamiya. Hiroshi Kamiya provided the voices for popular anime characters Itoshiki Nozomu and Orihaya Izaya, along with many others. Limone-Sensei provides (often humorous) song parodies by singing in the voice of these characters, and his videos songs have risen to fame due to the close likeness to Hiroshi Kamiya's voice.