1girl, armpits, arms_behind_head, arms_up, ass_visible_through_thighs, black_hair, blue_eyes, blue_one-piece_swimsuit, breasts, cameltoe, cloud, covered_navel, covered_nipples, from_below, loli, looking_at_viewer, looking_down, low_twintails, makigai, makino_yuna, one-piece_swimsuit, one_eye_closed, original, outdoors, pose, school_swimsuit, short_hair, short_twintails, sky, small_breasts, smile, solo, swimsuit, thighs, twintails