Successfully complete the game. Save the game to create a "Clear Game" file. Playing that file will resume the game at Yasogami High just before to the final Boss. The following bonuses will also be available.
The "Defeat the Reaper" request can be started from the "Clear Game" file or after a certain point in New Game+ mode.
If the game was completed with both characters, "A Family Affair" request can be started from the "Clear Game" file or after a certain point in New Game+ mode.
You can buy all initial equipment at the Workshop.
You can start another session in New Game+ mode. All previously earned items, equipment, Personas, map data, and other things will be retained.