1girl, amagami, ayatsuji_tsukasa, black_eyes, black_hair, black_jacket, blazer, blunt_bangs, blush, breasts, chalkboard, classroom, competition_swimsuit, covered_navel, indoors, jacket, long_hair, long_sleeves, looking_away, looking_to_the_side, nervous, one-piece_swimsuit, open_clothes, open_jacket, serizawa_(serizawaroom), solo, standing, swimsuit