Is this good? Also does it have romance or harems?

Yes... to the second question-
I like this series the same reasons I like "World’s Strongest Troll" (Which is like the non sexualized, non-romance version of +99 wooden stick, I highly recommend)

Back when I was still reading this I thought it was good but I got curious just rn and decided to read the latest chapter (187) and I questioned reality for a sec (I don't want to spoil it but its harem related)

Ohh okay thank you i’m definitely gonna check out “world’s strongest troll”