Summary
What would happen if a certain salaryman is reincarnated in the world of Made in Abyss? He becomes the best delver there is of course! But as much as Tanya just wants a better life for herself, the world seems to have other plans for her... Is it Being X s fault or the call of the Abyss? (A repost from AO3 and first time publishing anything on this site. Expect some complications.)