The worry-free grocery store singer Krone is a fictional character in the play, and there is no prototype in reality.

Kron is an amateur singer in "The Worry-Free Grocery Store" who loves music more than anything else. His biggest dream in life is to become a professional player and have his own masterpiece.

Kron was born into a bourgeois family that owns a family fish shop. His parents have given him a good life since he was a child. At the same time, their expectation for him is to return to the fish shop and inherit the fish shop with peace of mind after graduation. Then get married, have children, and live an ordinary life. However, the expectations and plans of his parents do not mean that he likes it. Krone has loved singing since he was a child. He originally planned to study his favorite music in college. However, due to pressure from his family, he chose economics, which others thought was good. The unwilling choice was the beginning of inner pain. Krone failed to complete his studies at the School of Economics and chose to drop out before graduating.