crowd, hibike! euphonium, hibike! euphonium series, kohei okamura, multiple girls, 6+girls, kitauji high school uniform, school uniform, kousaka reina, black hair, oumae kumiko, brown hair, serafuku, purple eyes, skirt, indoors, nakagawa natsuki, neckerchief, ponytail, blue skirt, long hair, short hair, pleated skirt, blurry, twintails, yoroizuka mizore, brown eyes, kasaki nozomi, pink neckerchief, blush, hallway