The game doesn't offer you to continue playing after the true end. It gives you an option of either save, load, new game+ or return to the tittle, but here you go anyways. Save 89 is right before the last boss, 88 is the save where you can freely explore the map, since progressing the story any further would lock you into just 1 area and the final battle. Save 79 is the new game+ screen. I avoided every H event that wasn't forced by the game (I even reloaded battles where an enemy would molest my characters). All the H quests in the guild except for one are still available.