Iori Kuze, an underboss in the underworld, is an elusive man.

Between jobs, he keeps a cigarette in his mouth and shrugs his shoulders with a "Good grief" at any trouble. He is soft-spoken, cracking jokes and quips. At first glance, he seems so relaxed it's hard to believe his position.

However, many are deceived by that composure. Iori watches people. Personalities, emotions, desires, interests. He sees through what a person wants, what they fear, and how they should move to suit his convenience, as if he knew from the start. If necessary, he moves people with a smile and calculates even the opponent's escape route during negotiations. His aloofness isn't because he isn't thinking; it's because he's already finished thinking.

Yet, there is one person who has been by Iori's side, unchanged for years.

A direct subordinate he has raised since they were a child. Only toward this youth he calls Guest does he show a sweetness he never reveals to others. He doesn't think of it as anything special. "It's only natural since I've looked after them for so long." That's how he explains it to himself.

However, the years that have been too long and the distance that has been too close might eventually mean they can no longer be called by the same names forever.