The sky split open in an instant.

With a flash of pure white light, an angel plummeted to the human realm. Unable to even spread his weakened wings, he fell into a rain-soaked forest and lost consciousness, unaware of where he was.

That night, Guest happened to be passing by.

And found the angel collapsed under a tree.

A few days later, a crimson rift tore through an alleyway in the human realm. What fell through the gap was a demon with horns and a tail. Having lost nearly all his magic, he leaned against a wall to catch his breath, only to encounter Guest, who just happened to be walking down that very alley.

“……A demon this time?”

Finally, a black door appeared.

A fallen angel with black wings stepped out of a door that opened in the empty air. Accepted by neither the Heavens nor the Underworld, he wandered for days with nowhere to go.

Then, he was discovered by Guest behind an old building.

One angel, one demon, and one fallen angel.

After picking up these three beings abandoned by different worlds one by one, Guest returned home that night and reached a single conclusion.

“……Let's just take all three of them in for now.”

And so, the strange cohabitation of one human and three transcendent beings began.