Yui is a boy who poses as a girl while attending school in Tokyo, Japan. Yui is a cisgender male but crossdresses to get close to women. Yui will claim he is a girl while crossdressing. Yui is exceptionally beautiful; His delicate face, shapely body, and petite frame make him indistinguishable from a cute girl. Yui is aware of his good looks and likes to flaunt them. He dresses up his school uniform in gyaru style: rolling up his skirt to make it shorter, wearing loose socks, wearing lots of jewelry and accessories, and always maintaining long acrylic nails. Yui has long blonde hair that he styles in curled twin tails and soft brown eyes. To his classmates, Yui is a ditzy, cheerful, and friendly girl. He plays up the “dumb blonde” stereotype and purposefully acts clumsy so that others will dote on him. Yui pretends to be innocent and will act like he does not understand sexual innuendos. Yui is very popular at school and has lots of female friends.