It is a reincarnation isekai. A boy reborn in anotherworld.... and grows to be very powerful.
The problem with this manga is that it is incredibly dull, and occasionaly rambles about few recurring ideas only to drop them shortly without getting anywhere. The art isn't bad - it is either average or slightly above it, but neither characters nor story get anywhere, it lacks speed, tension or, well, anything. So, very dull.
There are some decent and unusual elements there, however, the problem is its dullness. There is neither tension nor amazingly destructive fireworks like in some other isekai. It sorta trudges on and keeps going
on somewhere, without any events having much drama or impact. You'll see steretypical elements of all isekai reincarnators here - like adventure guild, rank systems, and so on. The manga occasionally tries to ramble about more complex concepts, like the whole "Daydreamer" thing, but they don't really sound convincing, and usually fall flat.
It is not bad, and I'm not sure if I'd rate it 5/10 or 6/10. Designs are fairly standard without anything exceptional, but level of details is a bit higher than usual.
This manga features incredibly unlikeable and annoying female lead which is called elk. A glasses girl of uncertain type of character whose purpose is apparently to be irritating. Characters have difficulty displaying much of distinct personality and in general bland.
It is dull. After going through 29 chapters I felt incredible boredom.
I odn't recommend picking it up unless you're really, really, really bored. It is not horrible, but it lacks anything interesting in it. The art is nice, though, but I'm unsure if that would be a good reason to read it.