Appears in <i>Eien no Tochuu</i> (Eggshell). Koga is a high school teacher, and Shiihashi's colleague. Students like him for his easygoing demeanor.
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Appears in <i>Eien no Tochuu</i> (Eggshell). Koga is a high school teacher, and Shiihashi's colleague. Students like him for his easygoing demeanor.
