So.. that's how I often experience it in every game, especially visual novels. Whether the progress of the game I'm playing is nearing the end or has been completed, there is no notification or indicator of how many percent or clear instructions. To be honest in Another World there are still many things to do such as achieving third heart intimacy, increasing levels, completing missions from guilds, and saving lots of coins :v
Regarding the end of the journey (ending) of the game can be announced whether you want to continue or stop here, let's just say the main plot is finished. This may be a little selfish but since the game is still early and I don't know what happens in the future it's better to be like this first by stopping the activity once it reaches the end of the game.
That's probably all I want to say for now. Thank you so much GM for answering my curiosity ^^