1girl, 2021, anbj, bikini, bikini_under_clothes, bracelet, breasts, brown_hair, character_name, cleavage, collarbone, dated, denim, denim_shorts, earrings, hair_ornament, hair_scrunchie, happy_birthday, idolmaster, idolmaster_cinderella_girls, jewelry, large_breasts, leaning_forward, looking_at_viewer, matsunaga_ryo, no_shirt, ponytail, scrunchie, short_shorts, shorts, solo, stud_earrings, swimsuit, white_bikini