ニートだけどハロワにいったら異世界につれてかれた

ニートの山野勝（23歳）はハローワークへ行き、気になる求人を見つけた。 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 hes 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?!