I Want My Big Brother, Sonic

After When You Have To Protect a Little Brother! Dark Oak will do anything to take down the heroes even if it means injecting Sonic with a special serum. Without telling his friends,Sonic begins to develop problems controlling his temper and mood swings! But when Sonic's temper boils over it may be too late for the him unless Tails can save his brother! Will Tails save Sonic?