1girl, o, aikir_(jml5160), beach, black_eyes, blue_sky, blush, bodysuit, breasts, chestnut_mouth, cleavage, cloud, diving_mask, diving_mask_removed, diving_suit, fins, girls_und_panzer, goggles, grey_hair, hair_between_eyes, hand_on_own_knee, holding, holding_mask, itsumi_erika, large_breasts, mask, open_mouth, outdoors, rock, scuba, sitting, sky, snorkel, solo, water, wet, wetsuit