3girls, anniversary, blush, collarbone, copyright_notice, dark-skinned_female, dark_skin, fingernails, hair_ribbon, idolmaster, idolmaster_shiny_colors, izumi_mei, looking_at_viewer, mayuzumi_fuyuko, multiple_girls, nail_polish, neon_lights, paw_pose, ribbon, serizawa_asahi, shigure_ui, straylight_(idolmaster), upper_body