1girl, 42_itsutsuki_21, bikini, breasts, choker, cleavage, expressionless, grey_hair, idolmaster, idolmaster_shiny_colors, jewelry, looking_at_viewer, medium_breasts, mermaid, monster_girl, necklace, pearl_necklace, ponytail, purple_eyes, sarong, shell, shell_bikini, sidelocks, sitting, sketch, solo, swimsuit, twitter_username, white_background, yokozuwari, yukoku_kiriko