Kusatta Kyoushi no Houteishiki (Bad Teacher's Equation) is a completed manga at forty seven chapters within ten volumes. Released in 1993 it is written and illustrated by Kazuma Kodaka. The volumes were also released in five volumes from June 28, 2011 to October 9, 2012.

The first of two anime OVAs were released in 1994 by studio J.C.Staff. A "You are my treasure" drama CD is available.

There is a side story titled Kusatta Kyoushi no Houteishiki dj - Happy Dream?, a spin-off named Renai Houteishiki and a sequel called Kusatta Kyoushi no Houteishiki dj - Andante.

Synopsis[edit | edit source]

It stars Atsushi Arisawa, a young man just starting high school. He has been in love with his tutor, "Ma-Chan" ever since he was little. He decides to go to the High School that Ma-Chan teaches at. Atsushi is in for a rude awakening when the man of his dreams, who was once kind and loving, becomes the total opposite and nothing like the loving Ma-Chan he once knew. Meanwhile, Atsushi's classmate and first kiss, Inagaki, is in love and after Atsushi.

Characters[edit | edit source]

Main Characters[edit | edit source]

Atsushi Arisawa[edit | edit source]

A new High School student, he has been in love with Masami (Ma-Chan) ever since he was little. After finding out that the man he thought was Ma-Chan, was actually Masami's younger brother Masayoshi, he instead falls in love with Masayoshi and redirects his feelings towards him. Atsushi is very naive and happy go lucky, yet he matures and becomes more serious and understanding of situations. He is sometimes referred to as "Akkun" and is 16 before his age becomes that of around 20-21.

Masami Shibata[edit | edit source]

Addressed Ma-Chan by Atsushi, he previously taught in a high school. Since retired, his younger brother Masayoshi has assumed his place. When he was a teenager Masami helped tutor Atsushi. Masami is kind, thoughtful and caring. He is currently in a relationship with Tooru, and eventually the two get married.

Masayoshi Shibata[edit | edit source]

A party type Masayoshi is also a nurse in the high school infirmary. He is Masami's younger brother and the complete opposite of him with no etiquette, a harsh attitude, and no plans on settling down. Very attached to his older brother Masami, he was never separated from him since childhood. When Masami begins seeing Tooru, he feels threatened and scared to be left behind. Masayoshi was also jealous of his brother's person of affection for gaining his attention. With time he eventually gets over it as he wants to become independent and let his brother have a life of his own with Tooru. Masayoshi is very aware of Atsushi's feelings and sometimes uses his feelings to do better in school, such as bringing him on a date if he gets a good score. For a short time, he dates Mizhua Toda. He is 26 before becoming around 30-31.

Kouji Inagaki[edit | edit source]

Similar to Masayoshi, he has a harsh demeanour, breaks the rules and is the juvenile type. Ever since Inagaki had his first kiss with Atsushi, he has been head over heels in love with him and will do anything he can to get him. In attempting to get a kiss on Atsushi it is to the point that it's just awkward and just does not work out. His best friend is Yoriko who he is cheered by. Inagaki is 16 before turning around 20-21.

Yoriko Hayase[edit | edit source]

The epitome of a yaoi fan girl, she supports her best friend Inagaki, and will do whatever it takes to acquire a picture of two guys kissing. Any sort of romantic interest will do, even if it's Atsushi with Masayoshi. It would transpire that Yoriko is in fact in love with Inagaki. She is 16 before becoming around 20-21.

Tooru Hagiwara[edit | edit source]

The same age as Masayoshi, and upon meeting Masami, he instantly fell in love. When Tooru found out that Masami was a man, it did not change his feelings for Masami. He is also a teacher at the high school, and frequently hangs out with Masayoshi in the teachers lounge. Before Masami, he dates a girl. Tooru is known as the bear, due to being excessively hairy, which is never shown rather it's just said he is hairy. He is 26 before changing to 30-31.

Minor Characters[edit | edit source]

Yoriko's Brother[edit | edit source]

He is seen during a basketball game where he is a part of the team. Due to a past event when they were younger Yoriko's brother refuses to allow Inagako to play with them. He was present during the graduation ceremony.

Atsushi's Mother[edit | edit source]

She is a very kind woman and likes to make treats for everyone.

Inagaki's Mother[edit | edit source]

Unlike Arisawa's mother, Inagaki's mother is mean and very harsh to Inagaki. She is referred to as the old hag by Inagaki on occasion.

Leaf[edit | edit source]

Masami and Masayoshi's mother, she passed away when they were both young and while their father was away in Japan trying to start a business.

Yoshiyuki Shibata[edit | edit source]

Masami and Masayoshi's father. He loves his sons and is very happy when he gets to see them, although he is not happy when he finds out that Masami is with a man. Eventually he comes around and even cries at Masami and Tooru's wedding. He is close friends with "Yukio" (Or her stage name "Catherine"), a drag queen who still works at the club in Shinjuku.

Shibata's Grandmother[edit | edit source]

Masami and Masayoshi's grandmother is a wise woman, although she does not necessarily agree with Masami and Tooru's relationship. Regardless she gives her blessing anyways and actually mentions that their father did a similar thing when he came home to propose with an already pregnant Leaf.

Takami Kenya[edit | edit source]

A young man at 21 who Tooru befriends on his way to Norway. Upon going to Norway, he tried to sleep with Tooru, however this was declined. Takami reveals that he hates artists, this is actually do to his ex boyfriend, Karl. He appears later and revealed that he almost slept with Tooru's younger brother.

Karl Klog[edit | edit source]

Kenya's ex-boyfriend, turned back to boyfriend. He was a painter who would paint Kenya nude. After he fell in love with Kenya, he lost his painting mojo and dumped him. Kenya was upset saying he was the one that suffered the most. After a reunion, the two become a couple again.

Catherine[edit | edit source]

Is her stage name, and she is sometimes called "Katrin" but her birth name is "Yukio" yet hates being addressed by that. She is an old friend of Yoshiyuki. They once lived together after Yoshiyuki found Yukio in a pile of garbage. She helped him out in many ways, such as starting the club in Shinjuku. Catherine displays feelings for Yoshiyuki, and refers herself as his second wife.

Kayako[edit | edit source]

Working at the Shinjuku club Kayako like Catherine wears clothes not generally associated with her assigned at birth gender.

Kyohei Hagiwara[edit | edit source]

Tooru's younger brother, he knows about Tooru being with Masami and is accepting of the fact. When Kyohei was kissed by Kenya they almost became lovers.

Mizhua Toda[edit | edit source]

She works as model. Mizhua and Masayoshi date for a very short time, and it is revealed that Mizhua was actually arranged to marry Masami. When Yoshiyuki remembers that he arranged Masami to marry Mizhua, Masami refuses and chooses Masayoshi instead. Although Masayoshi and Mizhua get along pretty well, Mizhua decided to let Masayoshi figure his feelings out, and opened up to the idea of them being something in the future. But she hinted that maybe Atsushi, was the one for him and not her.

Tokiko Fukae[edit | edit source]

Mizhua's boss, and mentor. She wants Mizhua to act more like a lady and gives her more chances than other bosses would. It is revealed that she had dated Masayoshi for a while.

Eiko[edit | edit source]

Tooru's girlfriend before he met Masami. In the present time, her and Tooru spend the night hanging out. They fall asleep in the same bed, and Masami comes to visit Tooru and assumes they slept together. In the end, Eiko clears everything up with Masami, saying that nothing happened. Actually, she is engaged and was shortly leaving town.

Story[edit | edit source]

Arisawa begins high school

Shinjuku Club[edit | edit source]

The Shibata's have a club in Shinjuku, mainly run by Masayoshi. It is a bar where many of their friends gather, mostly drag queens, and other people who identify as LGBT+.

Travel[edit | edit source]

The cast go on vacation to a few places.

  • Japan, their home place.
  • Norway, Masami and Masayoshi's originally lived there for quite some time.
  • Hawaii, the crew go on vacation to Hawaii.

Manga[edit | edit source]

Publishers[edit | edit source]

  • Japanese: Biblos and Mediation
  • French: Editions Tonkam
  • Spanish: Ellago Ediciones
    • Translation: Trinidad Sepúlveda (Ellago Ediciones)
  • German: Carlsen Comics.
    • Translation: Nina Olligschläger
    • Copy Editing: Marcel LeComte
    • Editing: Britta Harms

Licensors[edit | edit source]

  • English: Digital Manga Publishing
  • Chinese (Taiwan): Tong Li Publishing Co., Ltd.

OVA[edit | edit source]

Characters and Voice Cast[edit | edit source]

  • Atsushi Arisawa - Nobuyuki Hiyama
  • Masayoshi Shibata - Kazuhiko Inoue
  • Masami Shibata - Keiichi Nanba
  • Tooru Hagiwara - Hideyuki Hori
  • Kouji Inagaki - Mitsuo Iwata
  • Yuriko Hayase - Maya Okamoto

Production Details[edit | edit source]

  • Kazuya Saitou - Animation Check
  • Harukichi Yamamoto - Theme Song Arrangement (ED)
  • Harukichi Yamamoto Theme Song Composition (ED)
  • Fusanobu Fujiyama - Sound Director

Images[edit | edit source]

Running Gags[edit | edit source]

  • There is one running gag where Masami and Tooru constantly get interrupted before they are about to kiss.
  • Tooru tends to end up in the dog house for saying the wrong thing, or gets too upset and worries about silly things.
  • Masayoshi getting a chill down his spine when Atsushi thinks about Masayoshi; the same happens if someone is talking about Tooru.

Trivia[edit | edit source]

  • In the OVA, Atsushi gets kidnapped, Masayoshi and Inagaki rescue him. This however, never happens in the Manga and is one of the only big differences between the OVA and the first volume of the manga.
  • Despite the series revolving around Atsushi and his love triangle between Masayoshi and Inagaki, Masami and Tooru's relationship is shown the most.

Wiki Link[edit | edit source]

Community content is available under CC-BY-SA unless otherwise noted.