Things change for Sonic and the gang, good has triumphed, Eggman has been defeated for the last time, and sonic and the crew are enjoying their moments of peace....which will be their last
After Sonic gets hit by a ray gun to make him younger the gang finds out that he isn't any ordinary child but a half demon child. So they have to go though with the hardships of taking care of him so they can get Sonic back to normal.