Ichinose's best friend appears to have feelings for Ai but hasn't made any moves. Mina is infatuated with him, yet he seems wary of her ever since a minor incident in junior high. He has been close friends with Sou for years. Unlike Sou, he is the epitome of a gentleman and not a playboy. His behavior towards girls stems from his mother's influence. She is beautiful and although she might seem harmless, she has a fierce side. During a parent-teacher conference in the manga, Mina's mom teased him about looking cute, which led him to snap back at her. His mother then swiftly shifted from sweet and kind to cold and stern, warning him against disrespecting women. He develops feelings for Ai and later attempts to win her over but backs off when he realizes how deeply she cares for Sou.
kato yuichiro
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Ichinose Sô
Main
The most popular guy in school, who Ai has a crush on. The vulgar, bad guy type. According to him, he lost his virginity at age 12. He dated many girls just for the sake of engaging in sexual intercourse or just because he felt like it. This changes when ...
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Kato Yuichiro
Main
Ichinose's best friend, he seems to have a thing for Ai but hasn't acted on it. Mina's crazy for him but he seems scared of her after the little incident in junior high. He's been friends with Sou for a long time. He's the exact opposite of Sou, he tends ...
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Maekawa Ai
Main
The main character of Doubt!. She was originally a 'jimi', the Japanese equivalent of a geek/nerd/dork, in junior high. After a devastating and embarrassing event she decides to step up her game. A few months before her first year of high school, she says...
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Sato Mina
Main
Mina is a trendy "ko-gal". She thought Ai was after Yuichiro, the guy she liked, so she turned the whole girl population against Ai. But later after she finds out Ai likes Ichinose and not Kato they become best friends. The reason why Yuichiro is afraid o...
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Akagi Tadashi
Supporting
Classmate of Maekawa. He was a host in the "Dreamers Club" that their class did....
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Chiharu Hamano
Supporting
A student teacher who seems to have dated Ichinose in the past. She wants him back and sees Ai as her enemy. She looks like a cute little bunny but her personality is the exact opposite. Shes Ais very first enemy in trying to capture Sous affections. She ...