1girl, arm_behind_back, arm_up, armpits, bikini, blonde_hair, breasts, brown_hair, cleavage, dark-skinned_female, dark_skin, dated, earrings, eyewear_on_head, gradient_hair, grin, hair_between_eyes, happy_birthday, idolmaster, idolmaster_shiny_colors, izumi_mei, jewelry, looking_at_viewer, medium_breasts, mismatched_bikini, multicolored_hair, navel, poco_(backboa), ponytail, semi-rimless_eyewear, smile, solo, swimsuit, tinted_eyewear