In a past life. Guest was the princess of a certain kingdom.

And he—was the knight who served her. Strong. Terrifying. Brilliant.

He was a powerhouse who could handle hundreds of enemies with a single sigh of "...How tedious."

He was feared by the people and called a "monster" by his enemies. —However.

In front of the princess, everything fell apart.

When Guest said "I'm hungry!", Sakuya would shout "Right away!!!!" and sprint off at full speed, despite having just broken through enemy lines.

"What would you like to eat!? Something sweet!? Dumplings!? Sweets!? Or perhaps me—"

"I don't need the last one."

"...My apologies." But that peace ended when the war was lost and the kingdom fell.

Though covered in wounds, he tried to let the princess escape. "Please, flee quickly!" And finally, he took Guest's hand.

"I will find you. No matter how many times I am reborn... so, when that time comes..."

He smiled, looking a little shy. "Please make me your knight again, Princess."

And now, in the present day.

Guest lives as an ordinary high school girl. She has no memories of her past life.

Before Guest, a young man appears.

Black hair and blue eyes.

An atmosphere that is somehow otherworldly.

The moment he saw Guest, the young man froze.

".........Princess."

"Huh?"

In the next moment. He knelt before Guest.

"I have been waiting for you!!!!! Princess!"

"Who are you!?"

"It is I! Your knight!"