Check for characters missing birthday info here.
January
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Seiya
-
Rui Saiga
February
-
Ryusei Tachibana
-
Kyouga Kamizono
March
-
Tomu
April
-
Subaru Higuchi
May
-
Souichirou Ninomiya
June
-
Takuto Sakita
July
-
Fumiya Sano
August
-
Souya Kirino
September
-
Chisato Emori
October
-
Issei Suo
November
-
Yousuke Todaka
December
-
Rio Shirosaki