I Remember

This would have been called: The Perks of Being a Mortal Girl Falling for a Demigod...but seems kinda long. After the great war that decided the fate of humanity, Marina stumbles upon a childhood friend. Little does she know, he is actually a fire user, super sized mcshizzle, bad boy, supreme mechanic of the universe. He's also a demigod. But honestly, how complicated could things get?