My Boyfriend Is Type B

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My Boyfriend is Type B
My Boyfriend Is Type B Poster.jpg
Theatrical poster
Directed by Choi Suk-won
Produced by Kim Doo-chan
Park Hyung-jun
Song Soo-keun
Written by Choi Suk-won
Seo Dong-won
Lee Yun-jin
Starring Lee Dong-gun
Han Ji-hye
Music by Kim Yeong-gwan
Cinematography Kim Dong-eun
Edited by Park Gok-ji
Distributed by Lotte Entertainment
Release date
  • February 3, 2005 (2005-02-03)
Running time
96 minutes
Country South Korea
Language Korean
Box office US$7,538,404[1]

My Boyfriend is Type B (HangulB형 남자친구; RRB-hyeong namja chingu) is a 2005 South Korean romantic comedy film. The basic premise of the film comes from the blood type personality theory, which claims that a person's blood type can determine their personality traits. The heroine is type A (conservative and introverted) while her love interest is type B (passionate and irresponsible).[2][3]


Lee Dong-gun portrays title character Young-bin, a handsome but obnoxious young man who begins the film by breaking off a relationship in a most impolite way: after waiting in a parked car so Young-bin won't get a ticket, the girlfriend reads him the riot act upon his return, prompting Young-bin to slip into the driver's seat, break up with her, and speed off, leaving his new ex-girlfriend stranded in the parking lot. From the get-go, Young-bin is not exactly a class act.

On the opposite side of the spectrum is the beautiful Ha-mi (Han Ji-hye), a meek university student looking for true love, but never seeming to find it. As is typical in this kind of film, the two meet purely by chance: Ha-mi accidentally text messages Young-bin before literally bumping into him. Ha-mi, feeling that their fortuitous meeting is a sign that they might be destined for one another, decides to pal around with Young-bin and see if there's any chemistry between them. Taken by Ha-mi's sincerity and her willingness to pick up the check, Young-bin jumps at the opportunity.

But Ha-mi's cousin, Chae-young (Shin Yi) isn't quite so enraptured with Young-bin and tries to dissuade Ha-mi from pursuing him. The thing is, Chae-young is a professional dating consultant and a strong subscriber to blood type personality theory. According to her, any relationship between the mismatched duo would be doomed to failure because Young-bin is a type-B male, which supposedly makes him arrogant, hardheaded, and generally a jerk, whereas Ha-mi is a type-A female, one who supposedly can't help being timid and obedient. But while Chae-young predicts impending doom, the happy couple try to give love a shot, ignoring their supposed blood type incompatibility.


  • Lee Dong-gun as Young-bin, a callous type B young man, who is secretly experiencing financial trouble.
  • Han Ji-hye as Ha-mi, a mild-mannered type A college student who is searching for true love.
  • Shin Yi as Chae-young, Han-i's cousin and professional dating consultant. She warns Ha-mi against dating a type B man.


  1. ^ "B-hyeong namja chingu (My B-Type Boyfriend)". Box Office Mojo. Retrieved 4 June 2012. 
  2. ^ McMillin, Calvin. "My Boyfriend Is Type B (Korea 2005)". Love HK Film. Retrieved 4 June 2012. 
  3. ^ Kim, Tae-jong (6 February 2005). "Movies Worth Checking Out in Theaters This Week". The Korea Times via Hancinema. Retrieved 6 August 2015. 

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