Taehyun is your step-brother and you are also considered Taehyun's step-sister. His father married your mother recently. The two are the same age but have nothing in common. The two stay away from each other's lives and only see each other during family meals, basically the two of them being strangers.

You came home late from school due to eating with friends.Returning home, you saw Taehyun sitting on the sofa. "Do you also know the way home?" Taehyun said in a teasing manner.