My Sister Is a Bit Too Controlling

Traveling to a parallel world, Yi Xian is bound to the development system, and you can get rewards by cultivating designated tasks. "Hey hehe... Brother, I like you the most." The first training target is the sister who is severely controlled by her brother - Yu Xinran. You have to hold hands when going out. Housework is all included. I always want to get into Yu Xian's bed... "I will be patient outside. When I get home, you must let me act like a spoiled child." Even though she was trained to be a big star, her sister still went her own way, which gave Yu Xian a headache. If this continues, it will turn into an orthopedic plot, right? However—— "My brother is actually not related to me by blood... I really want to marry him!" A medical record broke the peaceful routine. What happens when a sister who is a big brother-controller discovers that she is not related by blood to her brother? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.