Answer
Yes. The publicly described opening and the first station can be played free of charge up to the intended point of progress. A one-off purchase unlocks the full game. According to the current Google Play listing, there is no subscription and there are no further in-app purchases. The price and scope shown in the store at the time of purchase are authoritative.
Before you buy, the app shows you which content is free and what the one-off purchase unlocks. The store listing shows the current price.
As of 3 September 2026
Further reading
Related topic: OshiYa