Synopsis："Lin Duo was raised by the Lin family from childhood and grew up surrounded by love and care. At the age of twenty, she suddenly learns that the family's biological child is finally coming home. Not knowing what else to do, she goes out of her way to be thoughtful and welcoming, checking in constantly and even carefully picking out a special gift. Filled with excitement, she eagerly waits to greet the new arrival—only to discover that it's Jian Xi, her classmate. There is no gentle little sister. Standing right in front of her is a six-foot-tall young man. In an instant, all the sweet words she had prepared and all her thoughtful gestures become unbearably awkward."