Entering the Doomsday in Advance, I Started to Make Plans

The Protagonist and the Country Develop Cheats Together, and the Protagonist Can Travel Through Various Movies and TV Series

I want to read a book similar to "Thank you for the invitation, I was discovered just after traveling through time". Similar to this, the protagonist can travel through various worlds, and then the country strongly supports it. The protagonist and the country rush to each other. The protagonist relies on the country to obtain technology from various worlds to make the country develop and grow.