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

Description: The NEET Yamano Masaru (23 years old) went to Hello Work and finds an interesting job offer. [A swords and sorcery fantasy, test play for Miniature Garden of Razgrad World. Extended period of time, preferred to be able to live on site. Monthly salary of 250,000 + percentage pay] Immediately goes to the interview and signs a contract. However, the place of employment is in another world. Because of the contract, he’s taken there, to survive, Masaru received a cheat but he is told the shocking truth. “This world will be destroyed in 20 years.” Can a simple NEET prevent the destruction of the world?!……