Yūsei Matsui (January 31, 1979, Saitama, Japan) is a manga artist known for manga Majin Tantei Nougami Neuro.His family given name in kanji is 松井 and given name is 優征. He was an assistant of Yoshio Sawai, the mangaka of Bobobo-bo Bo-bobo (Shirota Masakage made a cameo appearance in Shinsetsu Bobobo-bo Bo-bobo). Yūsei provided the voice of the mangaka in Episode 25 of the anime series Majin Tantei Nougami Neuro. Not much is known about him, but an interview can be found here.