1girl, bathtub, bike_shorts, black_sports_bra, blue_eyes, blush, breasts, collarbone, from_above, grey_background, gundam, gundam_suisei_no_majo, headband, lying, messy_hair, midriff, on_back, open_mouth, outstretched_arms, red_hair, reij_dddn, simple_background, sports_bra, spread_arms, spread_legs, steam, steaming_body, suletta_mercury, sweat, thighs, underwear