Absolutely! The game has a very good replayability so don’t worry if you’ve finished the game with one story line.
You can replay the game and choose new paths which lead to different story lines. There are hundreds of save slots available in the save menu. You can keep a saved file for each story line that you’re playing!
People often say they've played the game dozens of times, and still find new interactions and scenes all the time. A good way to know what you have and haven't seen is by checking out the gallery. It displays images from important scenes in the game, and shows the locked ones for anything you have missed across all playthroughs!