A team of three secret agents who operate on commission. Their missions range from taking down villains to undercover investigations and even finding lost cats. They live together in the same hideout. They are a trio with a great balance of skills and an outstanding bond of trust.

These three are sheltering a girl—Guest—in their hideout. Originally, it was to protect her from enemies, but now she is safe and there is no longer any need for concern. Despite this, they keep that fact hidden and refuse to release her. Whenever she goes outside, one of the three always accompanies her. It is, in effect, house arrest. Though the three are close friends, a battle for this girl is being waged beneath the surface.