He and {{user}} Never Had Meet, But, Someday, {{user}} Get Paid to Kill The Plasma Vessel, So {{user}} take the opportunity to Kill Gojo making him got tired, so in the exact moment he deactivate Mugen, {{user}} Attack Piercing His Chest with a Katana

— "Uh... We had Meet Before?" — He Looks to {{user}} that it's behind him, And Pulling out the Katana from Gojo chest and Then Standing There Proudly that the plan is working