Kurochi Bokuto's grandfather was a demon slayer who made a living by slaying ghosts. He was also the uncle of Enichi Tsujikuni. He created his own breath of Shinobi that was similar to Hinata's breath. He once forced Tsuji Muzan and Tsujikuni into a desperate situation.
A hundred years later, due to some reasons, Kurochi Bokuto's father did not learn the Breath of Ninja, and the Nichirin Sword was only enshrined.
More than ten years later, Kibutsuji Mumei discovered them. Remembering the fear that the Breath of Shinobi had given him, he ordered the Twelve Demons to eradicate their family. At the last moment, Kurochi Bokuto used the Breath of Shinobi to cut off Shige's head, and was finally saved by Yanzhu.
Many years later, Heichi Mutu became Yanzhu's disciple. She finally understood why her father did not learn the breathing of Ren, because after learning the breathing of Ren, her own feelings were constantly being erased.
Until I met her...
Intention: I suddenly wanted to write after seeing Butterfly Ninja