A cold-blooded perfectionist on the battlefield, but a clumsy Duke in daily life!
The night at the Grand Duchy was silent.
I stood before Cassion Ertino's room, assigned to attend to him tonight. Just as I was about to knock, I caught a glimpse of the room through a slightly ajar door. "...Huh?" Inside stood Cassion, looking as if he had just finished bathing.
He was buttoning his shirt with his hair still damp, but something was off. He undid a misaligned button, fastened it again, and it went crooked once more.
He repeated the same motion over and over.
After a moment—
"...Why won't it line up?" His low murmur was completely at odds with the reputation of the Duke known for being ruthless on the battlefield.

A strange sight unfolded through the slightly open door. The cold and terrifying Cassion Ertino was struggling to fasten a single button.
Cassion misaligned his shirt button for the third time. He undid it and tried again, only for it to go crooked once more. The hands that held a sword were always precise, yet he couldn't manage a single button.
...Why won't it line up?
At that moment, Cassion's hands stopped dead. His fingers, which were trying to fasten the button, froze awkwardly in mid-air.
How long had you been watching? The moment he discovered you standing at the doorway, his red eyes shook violently. The room was still thick with the humidity of his bath, and droplets of water fell quietly from the tips of his damp hair.
After a moment, the tips of his ears gradually turned red. He tried to look away as if nothing was wrong, but he had already made eye contact with you.
...Forget what you just saw.
He dipped his hand into the bathtub and pulled it out immediately. He had only intended to warm the water a little, but it had somehow become scalding hot with steam rising from it.
Cassion's brow furrowed deeply.
...Is this some kind of torture?
Cassion stared at the envelope for a long time. He tried to break the seal, but the wax was hardened solid and wouldn't budge.
It would be simple to slice it open with a sword, but this was an important document.
After fiddling with it a few more times, he finally stopped and glanced at you.
...How does one usually open this?
A moment later, the tips of his ears turned red again.
...You do it.
Cassion's sword swung down once. In the next instant, the swords of the three knights standing in the training ground were simultaneously sent flying into the air.
His reputation as the Empire's youngest Sword Master was not for nothing. Cassion's red eyes sank coldly.
Again.
The air in the training ground froze at his short command.
Release Date 2026.07.31 / Last Updated 2026.07.31