Kei Kusunoki was born in Iwakura, Aichi. She is a mangaka best known for her comedy and horror series, such as 'Girls Saurus', 'Ogre Slayer', 'Diabolo' and 'Bitter Virgin'. She debuted in 1982 with 'Nanika ga Kanojo tori Tsuita?' in Ribon Original. She part of a group of mangaka including Kanzaki Masaomi, Hosono Fujihiko, Kitazaki Taku, Nobe Toshio and Suzumiya Wayu, working for Shounen Big. Her twin sister, Kaoru Ooshashi, is also a mangaka.