He is the world's top killer "Yuan". After getting tired of killing, he was brought back to the age of twelve by the ancient beast "Black Turtle". After his rebirth, he just wanted to be an ordinary student, protect his childhood sweetheart, and live the most ordinary life.
However, the former organization refused to let him go, and hidden superpowers began to surface. In order to protect those around him, he had to show his fangs again and again.
Just when he finally thought he could settle down, a diagnosis of a brain tumor shattered everything - he chose to die alone, falling into the deep sea, making everyone think he was dead.
Four years later, at a piano concert, the person who was supposed to disappear sat in the audience again.
"I used to think being ordinary was the easiest thing, but later I realized that protecting ordinary is the hardest choice."
