A Simple Thinking About Blood Type
Cover of the first manga volume
혈액형에 관한 간단한 고찰 血液型くん! (Hyeoraekyeonge gwanhan gandanhan gochal (Korean) Ketsuekigata-kun! (Japanese))
Genre	Comedy
Manga
Written by	Real Crazy Man
Published by	Earth Star Entertainment
Original run	January 26, 2013 – present
Volumes	5
Anime television series
Directed by	Yoshihisa Ōyama
Written by	Kenichi Yamashita
Music by	Daisuke Hiraki
Studio	Feel (Seasons 1–4) Assez Finaud Fabric (Seasons 1–4) Zexcs (Seasons 3–4)
Original network	Tokyo MX (Seasons 1–4) AT-X (Seasons 1–4) Nico Nico Douga (Seasons 1–3)
Original run	April 7, 2013 – March 29, 2016
Episodes	49

A Simple Thinking About Blood Type (Korean: 혈액형에 관한 간단한 고찰; RR: Hyeoraekyeonge gwanhan gandanhan gochal) 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!, lit. "Mr. Bloodtype") in 2013.^[1]

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.^[2]

Characters

Each of the voice actors also represents their own blood type.

Type A-kun (A型くん, A Gata-kun)

Voiced by: Jun Fukuyama

Type B-kun (B型くん, B Gata-kun)

Voiced by: Yuichi Nakamura

Type AB-kun (AB型くん, AB Gata-kun)

Voiced by: Tetsuya Kakihara

Type O-kun (O型くん, O Gata-kun)

Voiced by: Akira Ishida

Type A-chan (A型ちゃん, A Gata-chan)

Voiced by: Aoi Yūki

Type B-chan (B型ちゃん, B Gata-chan)

Voiced by: Yui Horie

Type AB-chan (AB型ちゃん, AB Gata-chan)

Voiced by: Mai Nakahara

Type O-chan (O型ちゃん, O Gata-chan)

Voiced by: Yu Kobayashi