__Height:__ 170 cm
__Class:__ 3rd year
__Council Position:__ Secretary

Chizuru has a tall and model-like figure and is a mature woman who seems to spend most of her time being quite serious. However, she has a sadistic side to her, which is shown when she "brain-washes" Ken and Kurimu. Also, she makes a lot of references to her sadism in the anime. She loves to cuddle and "abuse" the President (Kurimu) in a little sister way, and is an avid reader. Sometimes, it is hinted towards her wanting to be involved with Kurimu. She is hinted towards having a couple part-time jobs despite being too young legally to even have a job. While she is identified as the cool, serious type, she can embrace her more cutsy side to her once hopping around dressed as a cute sheep. Chizuru and Ken met in autumn when Ken was suffering from a broken heart. Their meeting healed it and showed him 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.   (Source: Wikipedia) 

The members of the student council of Hekiyou Gakuen are chosen by a popularity vote. As a result, all the members are cute girls except for Sugisaki Ken, who studied hard to enter the council. The story features the endless chattering of the members full of parodies of "The Melancholy of Haruhi Suzumiya", "Dragon Ball", "Death Note", etc. 

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Sugisaki Ken, through diligence and academic excellence, had successfully entered the paradise that is the Hekiyou Private Academy's Student Council. There, he boldly embarks on his plan to create his personal harem with the 4 girls who are the other council members, namely: The incredibly youthful president Sakurano Kurimu; The cool and kindly yet super-sadistic secretary Akaba Chizuru; Tomboyish and hot-blooded vice-president Shiina Minatsu; and The ephemerally beautiful yet complicated treasurer Shiina Mafuyu. While every day since then has been non-stop fun, Graduation Day now looms near. Could this spell the end of their carefree days? 
(Source: translated and adapted from official site by Cranston)

The members of the student council of Hekiyou Academy are chosen by a popularity vote. As a result, all the members are cute girls except for Sugizaki Ken, who studied hard to enter the council. This novel is about the endless chatters of the members, full of parodies from various other works such as "The Melancholy of Haruhi Suzumiya", "Dragon Ball" etc. 
The series was originally planned to be titled as "Hekiyou Academy Student Council's Minutes (&#30887;&#38525;&#23398;&#22290;&#29983;&#24466;&#20250;&#35696;&#20107;&#37682;, Hekiyou Gakuen Seitokai Gijiroku), but because of the length, the title of the first volume "Seitokai no Ichizon" was chosen to refer to the whole series. It is also called "Seitokai Series" by some.

This casual school story features a student council made up of beautiful girls elected through a popularity contest and one boy!
 
The student council of Hekiyo Private Academy is chosen not through a normal election but through a popularity contest. Ken Sugisaki is the one student who managed to join the council through his good grades, and his wish is to create a harem! A casual school story about a very casual student council.
 
(Source: BookWalker)

Spin-off series for the Seitokai light novel series.

The characters from both Haganai and Seitokai no Ichizon visit each others' clubroom in this two-part crossover. Strangely enough, the male protagonists from each manga do not make appearances. 
Chapter One: 
The Neighbor's Club gets a mysterious message from a certain student council! This chapter was drawn by Itachi, the artist of the Haganai manga. 
Chapter Two: 
The Hekiyou Gakuen student council receives an invitation from the Neighbor's Club to visit. This chapter was drawn by 10mo, the artist of the Seitokai no Ichizon manga.

Chizuru Akaba