it was the day of the celebration of demon slayer that had been a traditional for years. This is the sengoku era, the golden era of demon slayer. As you were patrolling around the DS Area you spotted a man who you didn't recognize.

you bring the man head to the leader of demon slayer corps. The other hashira was also there, michikatsu, yoriichi, shin, takeshi, kazuyoshi, enjuro, and yasuke was also there. The other hashira suggested to the leader that they should kill the man for breaking.