There was a bug that occurred that by the time you reached the 2nd route you get a corrupt version of the 2nd route and then after you finish the corrupt version of the 2nd route you cannot continue on with the game and there is a constant cycle if you keep reaching the end of the corrupt route. NOW THIS ISSUE IS FIXED! For anyone who has experienced this bug, try skipping to the end of the second route twice in order to fix all of the flags. If this doesn't work, reset all of your data. This resets your persistent data but not your saves. So you can load the saves as a short cut. The flags are located at "the next day" scene after you get all 3 endings of the 2nd route, this should unlock the corrupt route. Then when you press the retry button or click the corrupt snapshot image in the select route screen it should bring you to the corrupt route. When you reach the end of the corrupt route it should say "to be continued" after the "next day" scene. After this Hiro's route should be unlocked.
NOTE: IF THIS DOES NOT WORK PLEASE LET ME KNOW!