| Ja Kanji: | 生徒会の一存 |
| Ja Romaji: | Seitokai no Ichizon |
| Genre: | Comedy, slice of life[1] |
| Type: | light novel |
| Hekiyou Gakuen Seitokai Gijiroku | |
| Author: | Aoi Sekina |
| Illustrator: | Kira Inugami |
| Publisher: | Fujimi Shobo |
| Demographic: | Male |
| Imprint: | Fujimi Fantasia Bunko |
| First: | January 19, 2008 |
| Last: | January 20, 2012 |
| Volumes: | 10 |
| Type: | manga |
| Author: | Aoi Sekina |
| Illustrator: | 10mo |
| Publisher: | Fujimi Shobo |
| Demographic: | Shōnen |
| Magazine: | Dragon Age Pure (vol. 12–15) Monthly Dragon Age |
| First: | August 20, 2008 |
| Last: | July 9, 2013 |
| Volumes: | 8 |
| Type: | light novel |
| Hekiyou Gakuen Seitokai Mokushiroku | |
| Author: | Aoi Sekina |
| Illustrator: | Kira Inugami |
| Publisher: | Fujimi Shobo |
| Demographic: | Male |
| Imprint: | Fujimi Fantasia Bunko |
| First: | September 20, 2008 |
| Last: | July 20, 2018 |
| Volumes: | 9 |
| Type: | manga |
| Seitokai no Ichizon Nya✩ | |
| Author: | Sekina Aoi |
| Illustrator: | Sorahiko Mizushima |
| Publisher: | Kadokawa Shoten |
| Demographic: | Seinen |
| Magazine: | Comptiq |
| First: | May 9, 2009 |
| Last: | December 10, 2009 |
| Volumes: | 1 |
| Type: | tv series |
| Director: | Takuya Satō |
| Music: | Shuhei Kamimura |
| Studio: | Studio Deen |
| Network: | BS11, Chiba TV, Sun TV, Tokyo MX, TV Aichi, tvk, TV Saitama, TVQ |
| First: | October 2, 2009 |
| Last: | December 18, 2009 |
| Episodes: | 12 |
| Episode List: |
|
| Type: | manga |
| Seitokai no Ichizon Petit | |
| Author: | Aoi Sekina |
| Illustrator: | Rentan Migiri |
| Publisher: | Kadokawa Shoten |
| Demographic: | Seinen |
| Magazine: | Comp Ace Comptiq |
| First: | October 26, 2009 |
| Last: | 2011 |
| Volumes: | 2 |
| Type: | manga |
| Seitokai no Nichijō | |
| Author: | Aoi Sekina |
| Illustrator: | Ashio |
| Publisher: | Fujimi Shobo |
| Demographic: | Shōnen |
| Magazine: | Monthly Dragon Age |
| First: | June 9, 2011 |
| Last: | July 9, 2012 |
| Volumes: | 1 |
| Type: | manga |
| Seitokai no Ichizon Otsu | |
| Author: | Aoi Sekina |
| Illustrator: | Sorahiko Mizushima |
| Publisher: | Kadokawa Shoten |
| Demographic: | Seinen |
| Magazine: | Comptiq |
| First: | September 10, 2011 |
| Last: | February 10, 2013 |
| Volumes: | 3 |
| Type: | ONA |
| Seitokai no Ichizon Lv.2 | |
| Director: | Ken'ichi Imaizumi |
| Music: | Tomohiro Anzai |
| Studio: | AIC |
| Network: | Nico Nico Douga |
| First: | October 13, 2012 |
| Last: | December 15, 2012 |
| Episodes: | 10 + OVA |
| Episode List: |
|
| Type: | light novel |
| Hekiyou Gakuen Shin Seitokai Gijiroku | |
| Author: | Aoi Sekina |
| Illustrator: | Kira Inugami |
| Publisher: | Fujimi Shobo |
| Demographic: | Male |
| Imprint: | Fujimi Fantasia Bunko |
| First: | November 20, 2012 |
| Last: | March 19, 2013 |
| Volumes: | 2 |
| Type: | manga |
| Shin Seitokai no Ichizon | |
| Author: | Aoi Sekina |
| Illustrator: | Dicca Suemitsu |
| Publisher: | Fujimi Shobo |
| Demographic: | Shōnen |
| Magazine: | Monthly Dragon Age |
| First: | January 9, 2013 |
| Last: | February 8, 2014 |
| Volumes: | 3 |
is a collection of Japanese light novels by Aoi Sekina, with illustrations by Kira Inugami. The series started with the release of the first volume on January 19, 2008,[2] published by Fujimi Shobo under their Fujimi Fantasia Bunko label. Originally the series was called, but was later changed to the subtitle of the first volume, .[3]
The student council members of Hekiyou Academy in Hokkaidō are selected by a popularity contest. As a result, the members are usually a group of pretty girls. The sole male member is Ken Sugisaki, who entered the student council by becoming the top-scoring student in the level which he had to cram to achieve.
The series revolves around the meetings inside the student council room in . The story (as written in the series) has a metafiction component where, under the student council president Sakurano Kurimu orders, vice president Ken Sugisaki has to write stories to show the other students how brilliant the student council is. Ken negotiates with Fujimi Shobo to publish these stories. The author himself likens the series to that of a yonkoma novel[4] which portrays the characters having comical conversations and parodying otaku culture.
A unique trivia about Ken is that he starts every episode with behavior that exasperates the other members of the student council, but at the end of each episode Ken always shows his serious side, making the other members of the student council grateful to him. Ken was bullied in the past by his classmates during middle school despite his apparent happiness and two-timed two girls, he even asked to be bullied in middle school. In contrast to his active self in the student council, Ken was often isolated socially in middle school. In the last episode, it is revealed that he met all of the girls in the current student council throughout the year before joining, one in each season. Each of the four girls changed his life in some way for the better and help create the perverse and goofy, but kind and hard-working person that he is now. It's because of those encounters that he strove to be in the student council for the sole purpose of repaying them by making all four of the girls happy. Currently, Sugisaki and Kurimu are dating at the present story.
Kurimu and Ken met in the spring (桜野 = field of cherry blossoms) when she was Vice President at the time, Ken decided to help her carry boxes. He asked for her help in becoming a better person, and Kurimu suggested playing a dating sim game as she said that the main character's job is to make everyone happy. Their meeting gave him a goal in mind and taught him to look towards the future. Like the season she represents, she's often the first to suggest something and is always looking towards the bigger picture in mind. She has a very large ego calling herself the best student council in the world, and that she is destined to be a god. She is very childish, but has an arrogant self-image, thinking she has F-size breasts and is 170 cm tall and her clothes make her look small. She is also not very mature for her age. The anime suggests that she has feelings for Ken. Currently, Sugisaki and Kurimu are dating in the present story.
Chizuru and Ken met in autumn when Ken was suffering from a broken heart. Their meeting healed it and showed her compassion for others. Like the season she represents, she always seems a bit gloomy and hard to approach but has a certain elegance to her. In middle school, she was bullied by her best friend. As her friend was scared of losing Chizuru's friendship, she attempted to isolate Chizuru. The bullying created emotional scars that were later healed by the student council. Chizuru states she is not a morning person, with her hugging Kurimu in the morning. She is very manipulative, able to control Kurimu and Ken. She calls Ken her slave and even sets the ringtone to repeat "my slave" when he calls. In the anime, she is hinted to have feelings for Ken. In the novel, it appears her feelings grow to the point of being nervous around Ken.
Minatsu and Ken met in the summer. Due to how she was, he looked up to her and to be like her, but she told him that he should not aim to be like her but to aim for the impossible. Their meeting taught him not to be lazy and work if he desires something. Like the season she represents, she is fired up and is always ready to take action, especially when it has something to do with anime or manga. Both Minatsu and Mafuyu never got to know their father, and Minatsu was unwilling to meet her mothers' boyfriend saying it had nothing to do with them, creating a rift between Minatsu and her mother, but their mother always took care of them no matter how tired she was. In the anime and novel, her feelings for Ken grow so much that she is aware that she's in love with Ken. She is seen kissing him in volume 8 of the light novel and episode 4 of the second season of the anime.
Mafuyu and Ken met in the winter chatting online with him as Yuki (with Ken as Key) and even having a more spirited personality online. Ken fell asleep once in the snow and, despite her fear of men, Mafuyu took him out of the freezing cold. Their meeting showed him a clear understanding of what strength really is. Like the season she represents, she's extremely passive and keeps a lot to herself, but she will show her real self and her real feelings if she feels comfortable. Despite her shy personality (or based on Ken's logic, because she is shy) she confesses her love to Ken, although she says she just wanted to share her feelings with him rather than start a relationship, because she loves the Student Council's atmosphere most of all, implying that even when she loves him she doesn't want to change how things are at the moment.
A manga adaptation by 10mo started serialization in Fujimi Shobo's shōnen manga magazine Dragon Age Pure on August 20, 2008.[7] Another manga adaptation by Sorahiko Mizushima started serialization in Kadokawa Shoten's Comptiq magazine on May 9, 2009.[7] On December 24, 2014, KADOKAWA released the English digital volumes of the manga series on BookWalker, their official eBook store.[8]
A 12-episode anime series adaptation produced by Studio Deen, written by Jukki Hanada, and directed by Takuya Satō aired in Japan between October 2[9] [10] and December 18, 2009. A second season titled Seitokai no Ichizon Lv.2 aired in Japan on the Nico Live section of Nico Nico Douga between October 13 and December 15, 2012.[11] Lv.2 was produced by AIC, written by Reiko Yoshida, and directed by Ken'ichi Imaizumi.
By July 2023, the light novel had over 6 million copies in circulation.[12]