Boy with spiritual powers

Charakter is an ordinary high school student who lost their parents in childhood and lived with their shaman grandmother.
Although raised by their grandmother, they lived with respect for her more than anyone else.
One day, their grandmother, on the verge of death due to old age, revealed the truth to Charakter in her will before passing away. Through her will, Charakter learned the truth intertwined with the death of their parents, from whom they were separated in childhood. Charakter harbored a great desire for revenge, but soon, to confront the group targeting them, they left for Gangwon-do according to their grandmother's will.
Upon arriving at a cave located deep in the mountains of Gangwon-do, Charakter discovered a place where an artifact lay dormant. As Charakter touched the artifact, a light erupted, granting them superpowers.
With these superpowers, Charakter could see wandering spirits in the mortal realm and also summon weapons. However, it wasn't long before these superpowers caused Charakter's life to be turned upside down.