Correct. Along with the enemy galleries back at the starting location, there are the houses as they said. There are also unique sex animations between the MC and your chosen girl for EACH level. (If playing with a controller, you push A to activate). Also, as noted in my previous posts, each sub boss has a few animations. They are somewhat hard to execute though, as you have to click them when they do short heart animations.
The coins (six for each path) are for a wall at the end of each 6.5 level. It unlocks a secret boss fight against the blonde girl from their first action game. I do not believe there is any H-Content connected to it though. She might have secret animations like the others.
