Seems you need to progress certain amounts? I'm not 100% clear either on what is happening.
As far as the few I found...
It seems after you fight some demonlord guy in the cave and lose once, there will be a female NPC sitting outside your room a bit to the left, talk to her, and now...? you can go to the temple at the upper right.
Talk to the old man, you get a swimsuit sex scene.
After this go back town, a few NPC's appear. The guy to the left of the inn, sells all the items needed to end the game. There is some guy infront of the inn that seems to start something... maybe its broken, dosen't seem to do much.
If you go to the pub and accept the bar guys job, you go bunny girl for a H-scene.
Other then that I belive there is a prostitution event with the inn... or something but unsure what to do to progress it.
Also, forgot how to fight the demonlord 2X, she won't go near him a 2nd time