The reason why it's +18 is because it -will- have NSFW content in the future, even if we've prepared an option to skip those scenes if you're not interested in them. Besides, some of the subjects that will be brought up in the future might be uncomfortable for some people, even if they'll be treated with respect.
As for the corrections, thanks for letting us know, we're already working on fixing them, but they can escape us sometimes.
We hope you enjoy the game!