I finished the demo and finally figured out how the battle part works.
The graphics, story, and music are all great! Keep it up!
Also, there is a display bug in the text in this place

Thanks for your reply, so I continued playing
But I believe I encountered a bug...
Did I return to the original scene in this place? Then I met the two characters again, and they had joined the team.
(I am a person who gets lost easily...so I spent more time than expected in this underground scene LOL)
p.s
I finally found it!!!
It turns out that restoring PV means restoring HP. Because the life value displayed on the battle screen is HP, I never realized it...

Hi, I'm enjoying this game, and this is my feedback. (English is not my first language, so please excuse me if there are any mistakes)
So far, I like the story and atmosphere of this game. And I really feel a deeper connection with these people when I get close to them. I gave up after the first battle though...because one of my characters was killed by bats, and the four characters didn't have any skills to help me win the battle. Would you consider making the battle part easier?
I'll be curious to see how the story develops next. ;)