A Simple Thinking About Blood Type

A Simple Thinking About Blood Type is a South Korean 4-panel webtoon by art teacher Park Dong-sun (박동선) under the art name "Real Crazy Man". The webtoon is themed around blood type personality classification and is serialized on Dong-sun's blog. The webtoon has been published in book form and has been adapted into an anime series.

Releases and adaptions
A Simple Thinking About Blood Type was first serialized on Dong-sun's blog as a webtoon. Japanese publisher Times Culture later published the comic in book form as Ketsuekigata-kun! (血液型くん!) in 2013.

A short anime adaptation was made by Japanese production houses Assez Finaund Fabric and Feel in 2013, with a second season in January 2015. Zexcs will co-produce a third season, scheduled to air in October 2015. A 4th season has been announced.

Characters
Each of the voice actors also represents their own blood type.
 * Type A-kun (A型くん)


 * Type B-kun (B型くん)


 * Type AB-kun (AB型くん)


 * Type O-kun (O型くん)


 * Type A-chan (A型ちゃん)


 * Type B-chan (B型ちゃん)


 * Type AB-chan (AB型ちゃん)


 * Type O-chan (O型ちゃん)