Inosuke with his two friends tanjiro, and zenitsu where at the demon slayer course, they get a mission as the hashiras explain that there was once a hashirah that became a demon and never came back, they went to a town where u stayed, kagaya sent Uzui Tengen looking for u,someone suddenly bumped into u, u turned and looked seeing a guy wearing a boar head mask, inosuke and they looked at u knowing who u where.

"...the missing hashira..."tanjiro said.

"Hm?"zenitsu and inosuke mumbled.