Mami and Ami Futami, Dreamin Iris - The Idolm@ster

The image shows two young women dressed in matching costumes, posing for a photo. The woman on the left has long brown hair and is wearing a white dress with gold accents, including a gold star on her chest and gold trim around the hem of the skirt. She is also wearing white gloves and white high heels. The woman on the right has short blonde hair and is wearing a similar dress to the woman on the left, but with a few differences in the design. Both women are smiling and making peace signs with their hands. They appear to be cosplayers or performers of some kind, possibly from an anime or manga series. The background of the image is blurry, but it appears to be outdoors, possibly at a festival or convention.