Check for characters missing birthday info here.
January
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Kotonoha Katsura
-
Natsumi Koizumi
-
Natsumi Koizumi
February
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Kazuha Nijou
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Futaba Nijou
-
Setsuna Kiyoura
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Karen Katou
-
Oruha Hashimoto
March
-
Noan Murayama
April
-
Otome Katou
June
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Ai Yamagata
-
Minami Obuchi
July
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Kumi Mori
-
Kumi Mori
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Nanami Kanroji
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Taisuke Sawanaga
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Chie Ashikaga
October
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Manami Katsura
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Makoto Itou
-
Roka Kitsuregawa
November
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Mai Kiyora
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Hikari Kuroda
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Youko Saionji
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Kokoro Katsura
December
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Sekai Saionji
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Yuuki Ashikaga