Drably Sister and Genderless

Stylish and cute twin younger brother Rio. Older sister Shio is not cute like Rio and is plain. She finds the way her younger brother acts whimsically to be unpleasant. By chance one day, Rio had his picture taken by a certain magazine street snap, and then begins coming to school in a girls’ uniform. Towards this Rio, who is always acting on his own whims, Shio is…