In order to be able to talk to the guys you need to defeat them. And if you select the correct choices then they will join you at your home. Of course it may be a bit hard to tell who is who as I have no experience in pixel art and I don't really know how to make sprites for the pixel part of the game. Also some monster guys do have a different method of getting them to come to your home. However, for the most part with the exception of the worm guy all monsters in the forest area just need to be defeated once and then they will join your home!
Viewing post in Lusty Tales - Monster Guys Awaken DEMO comments
Yea I don't know what is going on as I just made a new save and fought the first two monsters in the first part of the forest and if anything I one shotted the snake man. Of course I did notice that without the gear from the chest in the house that I couldn't win. As I equipped the fire tome and staff and sword and I simply used a fire ball spell and won the snake man fight with ease. So I am going to assume that you may have missed the chest or forgotten to equip the items and I don't blame you as I should have added a event that makes it so you have to get the chest before being able to leave.