Mothman transformation system? Please No(HIATUS) MTS

WPC#188 Gold Prize winner

Sammy was an ordinary boy who was minding his own business. Apart from getting bullied by his adoptive family and a few school bullies, he lived a normal life. However, it took one packet of Ramen to turn his life upside down.
"Welcome to the Mothman transformation system!"
"Are you kidding me? Do you want me to wear my underwear over my pants and fly everywhere? Do I look like a Marver character to you?"
"I have no choice customer no:0000123. This leveling system was developed to enhance the customers' hidden abilities. It wasn't my problem that you had monster blood in you."
How would he adapt to this ridiculous system and its demands?
"Do your company has a return policy?"
"My apologies Customer no:0000123. Once you are bound to the system, it will be a lifelong contract."
"..."
Little did he knew, the changes this system makes on his body were permanent. How would he react?
Would this savage system raise him to the sky or destroy him to the ground?
Let's find out. Enjoy your rollercoaster ride through his journey.
Warning: slightly mature language. (No mature contents though. : D)