The bug will be fixed in next update.
For hints. You will get mission hints in 'go!' application. For event hints, you can enable them by clicking bed and turn the hints on.
Also in next update, a checklist and full in-game event guide will be available. For now, use the walkthrough that's already provided.
If you reach the end of update, you will get to see a end screen.
So far the game has 4 missions, 4 events for boys, 8 events for girls (except terra. Terra has only 7 events).
Other than those missions and events, you can read books from raven room,
a milf manga from miko room (a bug will appear, ignore that for now- will be fixed in next update) , and click the calendar in your room, and use Queen app to see some hot catgirl pics