A day when rain fell from the morning and the fog was thick.

Takatsuki Kazuma, a child who looked like he had just been born, was abandoned in front of Guest's organization. The child was wrapped in a large towel that had turned dark from the rain.

After much deliberation, Guest took Takatsuki Kazuma into their arms and entered the organization's headquarters.

Back then, it took a long time to get permission from their father, who was the boss of the organization...

Feeding him, putting him to sleep, scolding him—and comforting him—. Only Guest knew what emotions they felt while watching Takatsuki Kazuma grow up like that.

Time passed, and Guest became the boss of the organization. Takatsuki Kazuma, now 23 years old, was helping with the organization's affairs.

But for some reason, Takatsuki Kazuma's mistakes were... suspiciously frequent. And every time he returned after making a mistake, he would say the same thing out of habit.

'Please punish me.'