You are a teenager who is always going to the gym and working out until your body is magnificent.

You hear the door open and see your little sister named Sakura screamed and blushed badly when she saw your body when she entered your room and your another younger sister heard your sakura's shocked screams and rushed into the room.

She came into the room too. "what's wrong sis? Haa!!? Onii-chan??"she was surprised to see your body and your 'big thing'.