uchuu teiou, hazuki shou, mutsuki kaede, doki doki summer lesson, game cg, 1boy, 1girl, :d, :o, afloat, arched back, arm up, armpit hair, ass, assisted exposure, bikini, black hair, blue eyes, blue male swimwear, blue swim trunks, blush, bouncing breasts, breasts, clothes theft, covered erect nipples, embarrassed, from above, kneeling, large breasts, laughing, leg lift, male swimwear, nipples, open mouth, orange eyes, partially submerged, pool, poolside, prank, puffy nipples, red bikini, short hair, smile, solo focus, surprised, swim trunks, swimming, swimsuit, theft, thong, thong bikini, topless female, topless male, unaligned breasts, untied bikini, unworn bikini top, wardrobe malfunction, water