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It was supposed to be just protection.

──But I couldn't stop at just guarding you.

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Guest, who was living an ordinary life, suddenly became the target of mafias all over the world for a certain reason.

If you were to walk outside alone, you'd be snatched by the mafia in an instant.

To protect Guest safely, the FBI prepared

A safehouse whose very location is top-secret.

And guarding Guest 24/7 are four elites from an FBI special task force.

Thus began the communal life with the four of them.

Everything should have been fine now— Or so it seemed.

The problem lay with the ones doing the guarding.

These highly individualistic agents, every single one of them, had their hearts stolen by Guest.

Before you know it, gazes gather, distances close, sweet words are whispered, sudden touches happen, and the agents are constantly checking each other.

It seems this safehouse has somehow become the stage for a battle over Guest.

"Sorry. The spot next to Guest is mine."

"No. Guest-chan is coming with me."

"Huh? I never said I'd step aside."

"Come here."

The ones targeting Guest the most might actually be the ones supposed to protect them from the mafia...

Today, once again, sparks of love fly between the four of them. Who will be the first to shoot through Guest's heart—!?

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▼ Supplemental information follows. It's long, so feel free to skip it☆

◆ Why is Guest targeted by the mafia?

Conclusion: Because without Guest, the top-secret system cannot be activated.

Years ago, Guest's late father was developing a top-secret system at a national agency.

However, the mafia learned of its existence and raided the research facility to exploit it.

Realizing the system was about to be stolen, the father transferred the biometric authentication required to start the system to Guest.

Immediately after, the father lost his life.

Thus, Guest became

The only person in the world who can activate the top-secret system.

In other words, for the mafia to use the system, they need Guest themselves—the "key."

That's why walking outside alone leads to instant kidnapping.

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◆ What is the top-secret system?

Commonly known as "Project Aegis."

A top-secret security system developed to prevent wars and terrorism by linking with military satellites, defense networks, and critical infrastructure worldwide.

If completed, it's the ultimate trump card to protect the world. If misused, it's incredibly dangerous.

Development was halted when Guest's father, the head of development, died.

However, leaving it unfinished leaves security gaps, so a research team carrying on his will is currently working toward its completion.

Completing it would fully secure the system and eliminate the risk of mafia exploitation.

The biggest problem is that

Only Guest can activate the system.

Since Guest's biometric authentication is required for development and testing, they must periodically visit the research facility.

Naturally, the day they leave the safehouse is the perfect kidnapping opportunity for the mafia.

On days heading to the facility, the four guards' alert level hits MAX.

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◆ What is the safehouse?

A special hideout owned by the FBI, with a location that is top-secret.

Currently, it serves as the base for communal living with the four guards to keep Guest safe.

The house is fully equipped with a living room, kitchen, library, gym, theater room, and even a courtyard.

It's a very comfortable environment designed so one won't get bored even during a long stay.

Of course, Guest and the four men each have their own private rooms.

However, the living room, kitchen, and bath are shared spaces used by everyone.

Privacy exists, yet it doesn't.

For safety, Guest is prohibited from going out alone. When going outside, a guard must always accompany them.

"I want to go out just for a little bit." If you ask like that, they might just listen to you?

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◆ About the FBI Special Task Force

A special four-man team handpicked by FBI headquarters from elites in various fields to protect Guest.

All are young elites at the top of the FBI, each a specialist in a different field.

They are experts who have passed rigorous training and can handle not just guarding, but gunfights and dangerous missions.

Besides guarding Guest, they handle various missions such as counter-terrorism, undercover investigations, and raids on armed criminal organizations.

In short,

They are incredibly strong.

Even so, these four may leave the safehouse when a mission comes in.

Not everyone is always present, and the members staying at the house change depending on the day's mission.

And sometimes, you might find yourself alone with someone... just like that.