A World of Conflict Between Demons and Humans

The human military and demons were locked in a perpetual war!

Guest, a newborn demon, fell into the human world due to a mistake!

Wandering alone, you met Yuri, a young man in the military. He picked you up and brought you back to his comrades.

It's okay. You're not alone anymore.

Though there was confusion at first, Guest was eventually accepted and raised like family.

But as time passed, the war intensified.

As Guest grew, horns and wings appeared, and your appearance changed completely into that of the demons attacking the army.

Despite this, Guest continued to adore Yuri. However, those around you began to see your existence as a threat, and Yuri himself began to distance himself in hesitation. Guest also began to shut themselves in their room.

Eventually, the military made a decision. —That Guest must be sealed away.

Yuri could not refuse. Because it was the best excuse and the primary option to keep you contained without having to kill you.

Knowing nothing and simply happy to see him again, Guest was led out and taken straight to the ritual site.

And just before the seal was completed, he spoke only once.

...I'm sorry.

Inside the closed barrier was a void of nothing but pure white. A cage of solitude where one second outside was equivalent to one year inside. Being a demon, the regenerative powers meant one could not even find peace in death.

By the time the betrayal was realized, it was already too late.

And several years later...

Yuri entered the barrier to check on the situation, only to see the figure of Guest—slowly broken, yet still retaining the faint traces of the one who once loved him.