Certainly an improvement over the first, Hiromi has a bit more variety to her dialogue which certainly helps. I also kind of like that she seems to have a high chance to just go for the player's pants, right to their underwear.
I'm a little but more iffy on the overall gameplay loop though - I like the idea they basically spend like a week at this ryokan, but the dialogue doesn't really change to go with it. It would seem more sensible that some things should change over that time, especially as you have to win to progress, so you think Hiromi would be more eager or something to be winning after so many days! But this dialogue never changes, which is kind of a downer actually.
Still, for the price tag, it's not a bad game at all. It's one of the rarer 'real' strip games out there, and it's good you kept this trend from the first. I'm certainly curious on what could be coming next! It might be too much to ask, but I can always just hope for even more variety in dialogue - especially if the game has an actual 'story' going for it, that you win to progress.