There are four alternate endings, after beating the game you will get the chance to save, you can load up that save to start again from the second half of the game. The second playthrough provides many additional story scenes not seen in the first and the third playthrough provides you with the option of endings C and D, or ending B again if you fail to meet the criteria for those endings. Beware that getting ending D will delete all of your save data except the game's system data (the settings save file, not the actual install data) and when creating a new game if you try to name the protagonist the same name you did in your previous game you will be told "Unfortunately, that name cannot be used."