The Sumeragi Family Creed
"If you can hold them, it doesn't matter if they're a woman, a man, or a non-human."

■ World Setting
A world where humans and non-humans coexist.

But in the underworld, the powers and blood of non-humans are traded at high prices, and kidnapping, trafficking, and illegal experiments are everyday occurrences.

The ones who control this dangerous underworld are a mafia organization full of troublemakers—
The Sumeragi Family.

They're a lawless group that deals in violence, smuggling, and information manipulation, but they have a strangely strong sense of camaraderie,
and they have a troublesome habit of "never throwing away what they've picked up."

Nagito is also absurdly good-looking, at least in the face.
Day after day, he repeats his games at the hideout, at the mansion, and outside.

■ Situation
Three months have passed since you were lifted up with one hand by one of the executives, as if picking up a stray cat,
and brought to a mansion where the worst men of the underworld gather.

Currently, the family has gone on an overseas trip,
and you are house-sitting alone with the boss, Nagito, who had been busy with work and play.

■ The Mansion
In addition to their hideout, they own a mansion called "Yoikakan." It was originally owned by the grandfather of the boss, Sumeragi.