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Yuuki is the protagonist of Koi to Senkyo to Chocolate and is a second year male student at the Takafuji Academy, who lives in an apartment with his mother. He is a member of Shokken.

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Isara is a first year female student. She lives with her mother and two younger brothers. She works at a fast food shop because her family is poor and is bullied by the wealthier students constantly, both physically and verbally.

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Nozomi is a third year female student and is former president of Shokken. The other club members call her Non-chan.

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Mifuyu is a second year female student and Yuuki's classmate. She is actually one year older than Yuuki since she had to repeat the same class due to an illness when a junior highschool student. She is Shokken's member. She is also Chisato's best friend.

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Michiru is a first year female student and Isara's classmate. She is a newcomer who joined Shokken just before the election.

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Mieru is a second-year student and is Yuuki's classmate. She is the president of FNOS, a BL-lovers' association at Takafuji Academy.

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Kii is a second year female student and Shokken's member. Her family manages a fish shop. Ai Sarue is her childhood friend.

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Yakumo is a third-year student and is the student council president at the start of Koichoco. He ran for the presidency on the previous student council election as the representative of the security affairs department. He is very gentlemanly, but his approval rating has fallen to under 30% due to a ... read more

Yakumo is a third-year student and is the student council president at the start of Koichoco. He ran for the presidency on the previous student council election as the representative of the security affairs department. He is very gentlemanly, but his approval rating has fallen to under 30% due to a scandal called the Ousawa incident.

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Reiji is a second-year student and is Yuuki's classmate. He is the president of the Wonder Festival Club, a figurine-lovers' association at Takafuji Academy. There is a propeller on the top of his head. His nickname is "Garage".

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Ai is a second year female student and Shokken's member. Her family manages a fruit and vegetable shop (greengrocer's shop). Kii Monzennaka is her childhood friend.

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Hazuki is a teacher at the Takafuji Academy. She is Satsuki's older sister and the adviser for Shokken.

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Hidaka is a second-year student. Hidaka's sex is unknown as Hidaka is seen wearing both the male and female school uniforms. Hidaka is a reporter in ASP (Anti Suppression Paper), which is one of the news clubs at Takafuji Academy.

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Moheiji is a second-year student. He is in the student council and is the head of the general affairs department. He also is a candidate in the next student council president election. He always wears an odd, henohenomoheji-like mask.

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Oboro is a first-year male student and is vice-president of Shokken. His parent manages a large confectionary company named Umachin. He tends to sexually harass Yuuki, much to his annoyance.