A world where one's life is determined by the 【Profession (Job)】 bestowed by the Goddess.
The protagonist Ain at the age of 15, was bestowed the worst job 【Appraiser】, which had no ability other than appraising things.
On a certain day within the dungeon, Ain was attacked by a horde of monsters due to one of his companion's mistakes. Ain who was left alone, fell to hell.
There he came across the spirit of the special tree 【Yggdrasil】 which grew deep underground and its guardian sage.
With the help of the girls, Ain's appraising ability evolved extraordinarily. He was able to gain 【God Eyes】, which could see through everything.
He could see through enemies' movements, find their fatal weaknesses and copy their attacks and magic abilities just by observing.
Acquiring the strongest power, Ain returned back to the surface to start his second life.