I Can See Everyone's Emotions Except Mine

Sylvain, the temporary retinue of Greycliff Territory, has an ability that cannot be revealed. He can see emotions. Anger is like rust-colored particles, fear is like gray-white frost, and sadness is like old cotton wool. Every emotion has a shape and weight. He relies on this ability to survive in the castle and protect every one of his subordinates in the most ruthless way - even if they hate him. Until he met the mercenary at the sentry post. Tied up, beaten, but still laughing. Sylvain saw the anger and joy in him twine and burn, like two different colors of smoke rising from the same fire. He had never seen anything like it. The man named Karan let a spark get on his finger. It will last three days. The lord gave him a task: to investigate the "Dead Deer Forest", a forbidden area in the north. The caravans were killed there and their goods were piled untouched by the roadside. People don't take things, they just kill people. There were never any deer in that forest. Deep in the jungle, they found a stone slab. There is a sentence sealed on the stone slab - it is not carved on it, but the emotion when saying this sentence is sealed in the stone. The container cracked. But the container is still there. Anyone who can read this sentence is the container. Come to us. Three thousand years ago, there was a civilization on this continent that used emotions as weapons. They turned themselves into vessels to contain the fears of an entire continent. The empire fell, but those things that were sealed never disappeared. They are seeping out of the ground. And Sylvain is the only one who can see them.