shimatamago, koshimizu sachiko, idolmaster, idolmaster cinderella girls, commentary request, highres, 1girl, bare shoulders, birthday, bow, bowtie, brown eyes, detached sleeves, diagonal-striped background, dress, hair intakes, hand up, heart, holding, holding heart, light blush, open mouth, pink background, pink bow, pink bowtie, purple hair, ribbon border, short hair, sleeveless, sleeveless dress, smile, solo, striped background, striped bow, striped bowtie, striped clothes, two-tone bow, two-tone bowtie, upper body, white bow, white bowtie, white dress