Change the future

Once upon a time...when I was 14, I saw many destruction all over the places, many innocent lifes was sacrifies that caused by two artificial human that is 17 and 18...

They were ruthless..they killing in their own pleasure to fulfill their thirst of blood.

My sensei Gohan-San trying fight them alone but unfortunately all that he can do is escape because they too powerful to be defeated

but..

what amazed me about Gohan-san he still not giving up despite how powerful the artificial human are. Then I became his student and trained hard so that I can beat those artificial human and save the future but it still not enough.

Gohan-san was badly injured and he lost his left arm..despite his lack of power he still trained me to became a super saiyan and beat those damn artificial human..

but on that day..

Gohan-san was killed by artificial human..I was sad..angry...frust because I can't help him...and those feeling converted me into super saiyan...Im so furious... I promise I will avenge Gohan-san and others 

and also I will change the future... I dont want see their tears anymore..I will protect their smile..