NEET dakedo Hello Work ni Ittara Isekai ni Tsuretekareta

The NEET Yamano Masaru (23 y/o) 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 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?!