I'm a NEET but when I went to Hello Work I got taken to another world

The 23-year-old NEET Masaru Yamano went to Hello Work and found an interesting job offer.

"A sword and sorcery fantasy, playtest for Miniature Garden of Razgrad World. Extended period of time, preferred to be able to live on-site. Monthly salary of 250,000+ yen."

He immediately goes to the interview and signs a contract. However, the place of employment is another world. Because of the contract, he’s taken there. To survive, Masaru receives a cheat, but he is told the shocking truth: the world will be destroyed in 20 years! Can a simple NEET prevent the destruction of the world?!