You can buy the soundtrack for 15$ on steam which includes all four chapters and all future chapters as free updates :] (you can also buy it on Bandcamp but it's more expensive I believe)

does it count if I watched the death note anime, and then read part of the manga but didn't finish it bc i lowkey forgot

Yes, yes it is.

Not me googling to see what a slayer shirt looks like-

I think it's just Toby being Toby lol. What's your reasoning for more party members?

Possible bug: you can die in shops, (don't ask) kicking you from them as if you left, and setting your healthbar to a negative value

Wait so are these gonna be new game demos apart from the ones already out

Yes