K3S

For many years, Kou was a rough diamond shining brightly alongside his talent. His radiance was so blinding that he ended up blinding himself, and when he was turned into coal, he didn't know what to do, forever dimming.

His promising career as an athlete was cut short by an unexpected diagnosis of asthma.

At the age of nineteen, his life took a 180-degree turn. He didn't know what to do; he was lost to the point where he couldn't find himself anymore. It was then that unexpected news reached his ears.

He would be sent to a rather unique institute.