Hello! Thank you for your support and checking out our game :)
The year 2 button was intentional upon the game launch back in April 2020. Since the game is a monthly serialization - similar to shoujo manga format - we didn't have a clear timeline of when the storyline would end so we had a placeholder for the 2nd year for potential future content.
At this time, you should be able to see Chapter 0 through Chapter 8 on your iphone, accessible via Year 1. In the next update (sometime this week), Chapter 9 will be released and we will actually be removing the 2nd year placeholder as Ch 9 will have romantic routes locked down.
Hope that helps :)