matsukura nemu, flandre scarlet, izayoi sakuya, patchouli knowledge, remilia scarlet, touhou, 4girls, beach, bikini, blonde hair, blue eyes, braid, breasts, chair, cleavage, day, female focus, food, frilled bikini, frills, fruit, hat, innertube, lounge chair, melon, mob cap, multiple girls, parasol, polka dot, polka dot bikini, red eyes, siblings, side-tie bikini bottom, sisters, string bikini, swim ring, swimsuit, twin braids, umbrella, watermelon