1girl, arona_(blue_archive), ass, blue_archive, blue_eyes, blue_hair, blush, bow, braid, breasts, cameltoe, covered_navel, desk, hair_bow, hair_over_one_eye, knee_up, legs, lying, natsumiya_yuzu, no_pants, no_shoes, old_school_swimsuit, on_back, on_desk, one-piece_swimsuit, ribbon, school_desk, school_swimsuit, short_hair, smile, solo, spread_legs, swimsuit, thighhighs, thighs, water, white_one-piece_swimsuit, white_thighhighs