Edit (13/06/2023):
I would like to take back what I said about this series. I couldn't contain my curiosity so I read the WN and this story is indeed trash. It's like the author doesn't want to stick to only one troupe, so they makes things progress super fast, while sloppily explaining things along the way. Author also makes up random bullshit on the fly to explain new shit they just thought of.
so yeah, this is INDEED TRASH. Read it as your own risk.
Original:
wow, everyone is just trashing this. Personally, I think this is decent enough.
The title, the genres and the summary makes it clear that this is just another fantasy story about raising pet, becoming strong (and possibly getting a harem along the way), and it's doing a good enough job of that.
If you come here expecting dark, gritty, realism, angst,... it's your own fault for expecting that in a story like this. However, if you don't mind a story where the MC does try and work hard (at least at the start) to get stronger, with some typical high school bullying and other cliche trope, give this a try.
It ain't no masterpiece, but it's a fun series to read when you just want to relax and read something mindlessly.