Artist, mangaka. Formerly tagged as 2215.
Father of Ninomae Mako and the author of Mako-san to Hachisuka-kun.
Creeparka was first created by this artist.
Pen-name: 221 (reading is given as ツツイチ, Tsutsuichi)
Fan-nickname: 2213 (Tsutsuichi-san)
Circle & site name: かりばにずむ (cannibalism)