tachi hirushi, akizuki ritsuko, idolmaster, idolmaster (classic), 00s, 1girl, annoyed, antenna hair, ass, back, bikini, blue-framed eyewear, blush, braid, breasts, brown eyes, brown hair, female focus, from behind, from below, game console, glasses, large breasts, looking at viewer, looking back, one-piece tan, shiny skin, solo, swimsuit, tan, tanline, twin braids, white background, white bikini, xbox 360