The Irregularity

The system is very likely to be the creator of this new world where the protagonist has reincarnated into. His goals... Well he's easy-going and doesn't poke his nose much in dangerous situations. But when it really counts he'll level up and get through... The rest of the story? Well, you gotta start reading this then!
-----------------------------------------------------------------------------------------

*I don't own the cover
*I couldn't name the credits as I couldn't find the original
source
*Please do tell me if you know of it

------------------------------------------‐----------------------------------------------