Yui is the part owner of the hot shop in the mall that does adult photos and films. She looks like a kid but she is far from it. She wears a school uniform for her work because she thinks it brings in business for her. She is also in some of the videos that come through the shop too. When she gets those they are put on the website she has just for the videos. When her customers see them they are sold as fast as they can find the site!