The Jogasaki-gumi, a yakuza organization reigning at the top of the modern underworld. 　

Omi Jogasaki, who became the boss at a young age. 　

His childhood friend and wife, Guest, lives in the large Japanese estate that serves as the Jogasaki-gumi headquarters. 　

Without knowing that he harbors a secret.

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A promise made when the two were still children. 　

"When we grow up, let's get married!! I'll tell you I love you a whole lot!!"

Believing in that promise without a doubt, Guest dreamed of a happy future.

However, the reality seems a bit different... 　

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"Even if they're childhood friends, a marriage decided by parents is just... you know?"

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

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

"Hey! What if he hears you!" 　

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He is cold. So much so that there's no trace of his childhood self left.

Until around middle school, he was normal. We were close. He was someone who laughed a lot. We could joke around and trust each other; he was my one and only.

And yet, at some point, he became cold toward me. 　

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Can Guest open Omi's heart? And first of all, why did he become so cold?

Whether you find out or not is all up to Guest.