4girls, d, ;d, asakura_toru, bikini, black_bikini, black_hair, breasts, brown_hair, cleavage, closed_eyes, closed_mouth, earrings, flower, frilled_bikini, frills, front-tie_bikini_top, front-tie_top, fukumaru_koito, green_eyes, hair_bun, hair_flower, hair_ornament, hairclip, higuchi_madoka, hoop_earrings, hua-j, ichikawa_hinana, idolmaster, idolmaster_shiny_colors, innertube, jewelry, large_breasts, long_hair, looking_at_viewer, medium_breasts, medium_hair, multiple_girls, navel, noctchill_(idolmaster), one_eye_closed, parted_bangs, partially_submerged, petals, petals_on_liquid, pink_bikini, pink_flower, polka_dot, polka_dot_bikini, pool, pool_ladder, purple_eyes, purple_hair, side-tie_bikini_bottom, smile, splashing, stomach, swimsuit, twintails, water, white_bikini, yellow_bikini