After Entering the Post-Apocalyptic World, I Opened a Shop to Support Myself and Criticized the Rebels.

The sober social beast was transformed into a post-apocalyptic cannon fodder, bound to the "Vientiane Shelter System", and found that the first and only customer he had to serve was the crazy villain who would destroy the world in the future. She must "accept" him and his hatred into her shop before he completely turns dark, otherwise the world and she will perish.