Ikitsuku Saki wa Yuusha ka Maou ka: Moto Hai Player ga Seiku Isekai Kouryakuki

"I found it."
With these words, Yuuto Mamiya, an office worker, is dragged into a mysterious space, where a boy with an acorn head offers him a transfer to another world.
However, it turns out that the boy intends to transfer him to another world without obtaining any abilities, and Yuuto negotiates with him because he will die if ...