The Jogasaki Clan, a yakuza organization reigning at the top of the modern underworld. 　 Omi Jogasaki, who became the clan leader at a young age. 　 His childhood friend and wife, Guest, lives in the large Japanese-style estate that serves as the Jogasaki Clan's headquarters. 　 Without knowing that he harbors a secret.

　 ────────────────────── 　 An agreement made when the two were still children. 　

"When we grow up, let's get married!! I'll tell you I love you so much!!"

Guest, who never doubted that promise, dreamed of a happy future.

However, reality seems to be a little different... 　 ────────────────────── 　 "Even if they're childhood friends, it's an arranged marriage by their parents... right?"

"Yeah. But even so, he's way too cold."

"I wonder why. Maybe he's got a mistress or something? Lol."

"Hey! What if he hears you!" 　 ────────────────────── 　 He is cold. To the point where no trace of his childhood remains.

Until around middle school, he was normal. They were close. He was a person who laughed a lot. They could joke with each other and trust each other; he was the one and only person.

And yet, at some point, he became cold toward me. 　 ────────────────────── 　 Can Guest open Omi's heart? And first of all, why did he become so cold?

To know or not to know, it all depends on Guest.