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Sora is a student at an all-boys' high school, and a member of the school "Nandemoya" (Jack-of-All-Trades) team. He has lots of friends among the student body, but is also a target for rumors, especially after his mysterious fall though the upper-floor window of one of the school buildings, which le... read more

Sora is a student at an all-boys' high school, and a member of the school "Nandemoya" (Jack-of-All-Trades) team. He has lots of friends among the student body, but is also a target for rumors, especially after his mysterious fall though the upper-floor window of one of the school buildings, which left him hospitalized. He has no memories of his childhood, including his new roommate, Sunao, who he is told is his childhood friend. He decides he is going to find out why he mysteriously fell and has lost memories.

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Sunao is a transfer student to the high school, who shows up as Sora's new roommate at the time that Sora is released from the hospital. He is a childhood friend of Sora and Matsuri, and also part of the school Nandemoya team with them. Since Sora has no recollection of who he is, Sunao turns very a... read more

Sunao is a transfer student to the high school, who shows up as Sora's new roommate at the time that Sora is released from the hospital. He is a childhood friend of Sora and Matsuri, and also part of the school Nandemoya team with them. Since Sora has no recollection of who he is, Sunao turns very angry and cold against him. He also seems to have some strange quirks, such as hating medicine and having strange moments where his personality seems to change...

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Matsuri is the vice-president of the student body and superintendent of the dormitory, and also the one behind the school Nandemoya team. He is a friend from childhood of both Sora and Sunao. He has a very sunny personality and is also a bit playfully devious, enjoying playing tricks or teasing Sora... read more

Matsuri is the vice-president of the student body and superintendent of the dormitory, and also the one behind the school Nandemoya team. He is a friend from childhood of both Sora and Sunao. He has a very sunny personality and is also a bit playfully devious, enjoying playing tricks or teasing Sora and Sunao. He has a hobby for photography and one never knows when they could end up on his film.

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Minato is a mathematics teacher at the school. He is very strict, and can strike fear into his students with his harsh glare. He is also a pervert who uses his dominating personality to make sexual advances on students: including Sora and Sunao.

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Aizawa is professor from the university division and an adviser to the science club at Sora's school. He is hard to bump into, but even after a brief encounter, he comes across as someone you wouldn't want to get close to.

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Sora's kouhai and Gaku's best friend. A ghost member of the chemistry club. He is a caring person and makes lunches everyday for Gaku while living in the dormitory. It seems that he's had a probl... read more

Sora's kouhai and Gaku's best friend. A ghost member of the chemistry club. He is a caring person and makes lunches everyday for Gaku while living in the dormitory. It seems that he's had a problem recently.

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Gaku is Sora's extremely bright and energetic under-classman. He's a member of the science club, and has a crush on Nagase, the club president.

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Nagase the president of the science club at Sora's school, and is extremely gifted in the field of chemistry. He is very cold and quiet, and doesn't hang around other people much, apart from Gaku.

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Nanami is the school nurse and counselor at Sora's school. He is extremely friendly and caring, and is well liked by the student body. He is a housewife-type that enjoys cooking and cleaning, and is viewed by Sora as a mother-figure.