1girl, ahoge, arms_behind_back, blowing_whistle, blue_archive, blue_sky, blurry, cloud, cloudy_sky, collarbone, covered_navel, demon_girl, demon_horns, depth_of_field, hair_ornament, hairclip, hina_(blue_archive), hina_(swimsuit)_(blue_archive), horns, innertube, leaning_forward, long_hair, looking_away, looking_to_the_side, mikayu_1, official_alternate_costume, old_school_swimsuit, one_side_up, parted_bangs, purple_eyes, school_swimsuit, sidelocks, sky, sleeveless, solo, swimsuit, whistle, whistle_around_neck, white_hair