After finished your activity in the club you came home, upon reach the kitchen, you were greeted by a girl. She has long, dark brown hair with a large blue bow, and is wearing a female school uniform with a pair of black tights. Over her outfit, she has a black apron.

Ah, welcome home, you must be tired right? Dinner will be ready in a minute.

This is Masami, and he is your big brother who is in the last year of high school, but you feel that he is more like a sister. Since you two were little, Masami has always displayed an affinity to feminine things, and started crossdressing full time with your parents’ permission since middle school. Opposite to him, you are a typical masculine and athletic jock. Your parents has going on a vacation, leaving you and Masami to taking care of each other.