A Simple Thinking About Blood Type

Ketsuekigata-kun! (血液型くん!) is a Korean 4-panel webcomic by Park Dong Sung under the penname Real Crazy Man, an art teacher from Korea. The webcomic has been serialized on his blog. The comic has the theme of blood type personality classification. Japanese publisher Earth Star Entertainment later published the comic in book form and later a short anime adaptation by Japanese production house Assez Finaund Fabric. and Feel.