Ok, having played a bit of the game again now, I do recall the bum scene, and the people in the lake... Again, a large breasted babe. I believe that's as far as i got, and as for as i made it again this time, even knowing that there are smaller breasted women down the line.
The hunt and seek nature of the game, where you have to go here and do this, to get that, so in turn you can grab this, to go here, is a bit excessive. It's just a personal preference mind you, but I prefer games with a smooth continuity and a more story-centric flow, where the player feels immersed in the world and the story, rather than being sent on endless benign tasks to get ancillary items, or unlock abilities. Games with this attribute, or alternately games where you have dozens of locations to choose from and you have to be at a certain spot at a certain time to trigger an event are just sort of off-putting for me.
In summation, it's probably a very good game, just not one that appeals to me personally; despite having several of the genres which are of my peak interests, like transformation, monster girl, demon girl, paranormal elements, and even small breasts.