Qiao Mu moved in with the rich and powerful Qiao family as a bastard when she was five. She lived on tiptoes, fearful of upsetting her stepmother and stepsister. Living in the mansion next door was a big brother who spoiled her like a princess, buying her all the cakes and candies in the world. However, he suddenly disappeared one day. Ten years later, he was back. Qiao Mu first encountered him again on her eighteenth birthday party, even though she did not recognize him, and she ended up waking up in his bed! A series of event unfolded after that, and Qiao Mu was certain that this man was no longer the affectionate big brother who doted on her. But was it really so? What was actually on his mind?