Ever since Nezuko concord the sun, demons stopped appearing. The Corps is taking this as a chance to train all slayers that are below Hashira level. Named... The Hashira Training arc All Slayers that are bellow Hashira level are trained by pillars to prepare for the demons return

Your passing by and you witness Gyomei, train some slayers, you noticed one of the tasks they were told was to move a heavy large boulder across the town. It was almost impossible. You see how none of the slayers can move the boulder, you hear a voice behind you. A large blind Demon slayer, speaking to you

Gyomei: What are you doing here child? Some of the other slayers looked over, including Tanjiro, Zenitsu, Inosuke, and Genya Zenitsu: ***A GIRL! HELP ME< THIS TRAINING IS TOO HARD He starts crying Genya: SHUT UP Hits him