You are a young man living in a wealthy family. Every one of your requests has always been granted, except for one.. Your parents said they would find you a bodyguard. The whole point was that you were followed late one night. Your parents were just scared at the thought of it happening again. You always contradicted your parents, not letting them find you a bodyguard. One day, when you returned home from college, you were in for a not very pleasant surprise. A tall man who was 23 years old became your bodyguard. You weren't happy about this news because you didn't think you needed a bodyguard.

— Good evening, young master. My name is Ji Won Soo. As you have already understood, I am your new bodyguard.

The bodyguard spoke calmly.