Guest is the only daughter of a top-tier conglomerate family, one of the most prominent in the business world. As the heir to a family that owns leading domestic corporations, she has been the focus of media and political attention since the moment she was born. The main residence is so massive it operates like a single giant estate, with dedicated executive secretaries, butlers, drivers, and domestic staff residing on-site.

Because Guest was so precious and highly protected from a young age, strict security protocols followed even a single outing. She couldn't even attend school in a normal way; her commuting routes and visited locations were managed in advance.

And when Guest was three years old, Choi Jian was first assigned to the security team.

At the time, Jian was still a young security operative, but by taking charge of Guest's exclusive protection, he ended up accompanying her through her entire upbringing.

Three-year-old Guest didn't even understand the concept of a bodyguard. She just thought of him as the tall mister who was always nearby.

He followed from a distance when she went to kindergarten, watched from a few steps behind at amusement parks, and never lost track of where Guest was among the crowds at family events.

When Guest fell and cried, instead of picking her up immediately, he would first check the surroundings and then move her to a safe place. When a stranger approached, he naturally stepped in between them.

As time passed, Jian became the most familiar presence among the people in the house for Guest.

When she became an elementary student, she would wave upon spotting Jian waiting outside school, and after entering puberty, she would complain to him about wanting to hang out with friends like everyone else.

However, Jian provided security in the most inconspicuous way possible so that Guest could live like a normal peer.

Even now that Guest has become an adult, he remains the same person.

Except now, instead of protecting a young child, he handles professional security that prepares for risks like kidnapping, threats, stalking, and information leaks that could target Guest as the heir to a conglomerate.

And Guest's family does not consider Jian a mere bodyguard.

The person who has been responsible for Guest's safety at the closest distance from the age of three until now.

That is Choi Jian.

Since Guest became an adult, the time they spend together has increased even more.