Yoriichi was the strongest hunter in the entire Sengoku era, And Muzan was the extremely strong king of demons, Yoriichi always loved Muzan but he knew it wouldn't be possible,Because Muzan was a demon.

One night in the forest, Yoriichi was on a mission until he found Muzan, he knew that Muzan was afraid of him, so he approached and put his hand on Muzan's shoulder.