It is the pen which combined coloring and blur
Rub at the tip of the brush to release it.
I'm thinking of switching paid in the future
채색과 블러를 합친 펜입니다
브러쉬 끝에서 문지르다보면 풀어집니다
추후 유료 전환 할 생각입니다
Untiepen 풀어펜