1girl, bikini, bikini_skirt, blue_bikini, blue_choker, blush, breasts, choker, frilled_bikini, frills, gin00, groin, highleg, highleg_bikini, idolmaster, idolmaster_shiny_colors, long_hair, looking_at_viewer, mitsumine_yuika, navel, no_eyewear, official_alternate_costume, simple_background, small_breasts, smile, solo, standing, stomach, swimsuit, two_side_up, water_drop