Here is 1 time purchase, and patreon you pay monthly
Viewing post in Fremy's Nightclub Remake Chapter 1 comments
No, You're just paying a monthly fee for early access to an update that will eventually be ported over. It's not more value to subscribe their patreon as you're paying 7$ each time to be only one update, not multiple, ahead of the people who waited and got the same content you had but only paying that one time fee of 6$.
TL;DR You're paying more over time for content that'll be ported over.
over here its 6$, one time purchase as others have said, and the game could get higher priced as more updates roll out, plus its way cheaper than 7$ a month, even if its just fremy rn and there arent many scenes, the game could end up being double or triple the price when its the full game, better to buy it now and just patiently wait for updates