I have now played the demo and I'd say it is pretty interesting, with the usage of the grappling hook to climb stuff, grab one item, or enter the well. I may grinded a bit in the arena, getting xp, dead guild cards, and money. Just so I can level up and get some useful items.
The spicy scenes do have its charm, and I get the feeling that there may be one more that I haven't seen yet or rather an area I haven't explored yet. So far, I have seen the bandit loss in the south woods, arena losses with swift, brute, and Nelson, mission failure in getting to the hot bath, and the 3 bandit capture slave scenes.
Currently my character is Level 6 and is D Rank. I wonder if that was all there is to the demo and if the Kappa from the screenshots is part of the demo.