1girl, balloon, blue_eyes, blush, breasts, earrings, floating_hair, grey_hair, grin, heart_balloon, idolmaster, idolmaster_shiny_colors, jewelry, looking_at_viewer, medium_breasts, namiki_illust, navel, serizawa_asahi, sideboob, simple_background, smile, solo, sports_bra, star_(symbol), star_earrings, stomach, sweatdrop, upper_body, white_background, white_sports_bra