Hm, actually not bad, I give it 7.5/10, rounded down.
It has hints of originality, though they're not properly developed. The author needs to spend more time thinking about the plot and setting, IMO, maybe discuss it with readers?
There's both Skills and Magic, and it seems both can be trained up. It's not, however, a straight-up LitRPG.
Cast-wise, there's a friendly princess with the Appraise Skill, and a prince who's a domineering womanizer and actually out-assholes the designated class asshole.
And in a novel twist, the uptight class-president guy actually allies with the class asshole immediately, because their powers combo to make them a near-unstoppable team.
There are serious plot holes, though. The MC is a tamer, and from how it seems, he's the only one in the world.
...So why did the princess conveniently bring along a caged tiger monster for him to tame?
Also, the MC's power is a bit too OP for comfort. He gets stronger the more he tames, which allows him to tame even more, and not only that, but the buff he gives to each tamed creature gets bigger too.
AND there's no XP or level-ups in the setting, only regular training, so he's the only one getting exponentially stronger.
There needs to be drawbacks or limits, something to plan around.
I feel like there's lost potential with the class beauty he used Tame on, because there isn't a noticeable impact on her mental state. She just uses it as an excuse to hang around the guy she always had a crush on.
Meanwhile, the third teammate is totally in the right for wanting to get tamed. She's a non-combat class; she needs all the buffs she can get.
In the end, there's still something there for me to care about and get annoyed by, which makes this manga better than the average cookie-cutter isekai.