I'm a NEET but When I Went to Hello Work I Got Taken to Another World

I'm a NEET but When I Went to Hello Work I Got Taken to Another World (ニートだけどハロワにいったら異世界につれてかれた, Nītodakedo Harowa ni Ittara Isekai ni Tsuretekareta) is a Japanese light novel series written by Katsura Kasuga and illustrated by Koban Sameda.

Plot
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?!