Demon Slayer: First-Class in Killing Ghosts, with Zero Emotion

"Butterfly Ninja scolded him for being stupid every day, but he was tempted first." "The self-created breathing method is ridiculously strong, and the emotional line is ridiculously weak - Butterfly Ninja even hinted at this, why doesn't he understand?!" "I was a butterfly ninja at the same time. She was called a fool every day, but every time she got hurt, she was the first one to rush over." ---