3girls, alternate_costume, aqua_(konosuba), ball, beachball, bikini, bikini_top_only, blonde_hair, blue_eyes, blue_hair, blush, breasts, brown_hair, crab, darkness_(konosuba), gs_(onsen_syndicate), hair_ornament, hair_rings, holding, holding_ball, holding_beachball, kono_subarashii_sekai_ni_shukufuku_wo!, large_breasts, looking_at_viewer, looking_back, looking_to_the_side, megumin, multiple_girls, navel, one_eye_closed, open_mouth, ponytail, red_bikini, red_eyes, short_shorts, shorts, sideboob, simple_background, smile, stomach, striped, striped_bikini, swimsuit, thigh_strap, underboob, yellow_bikini