Thanks to the guest, Call Me John for the first review that turned in to this oneshot.
Envy stared in disbelief at the little boy that had curled up at his side.
"What are you doing, brat?" Envy growled at the dark haired boy.
"I'm hugging you." Five-year-old Roy Mustang answered, cheekily.
"Why?" Envy inquired of the child.
"I'm sad; Mommy and Daddy's gone." Roy answered the envious homunculus.
"Good for them! I wish that you were gone!" Envy snarled at the young lad.
"Please let me stay! I'm sad, and you're mad. We'll make eachother happier." Roy announced, cheerfully.
Envy stared at the kid before him, "Okay, kid. I'll stay."
Naturally, Envy ended up adopting the future Flame Alchemist.
Father had let him 'keep' Roy.
Envy quickly began to hate catering to Roy's every need; Envy made an awful parent.
Somehow they had came out of it unscathed, though Envy found out that the thing that he hated most was to let Roy go; Roy planned on learning about Alchemy from a Berthold Hawkeye, and wanted to join the military to become a state alchemist.