Sold Off by My Mom, I'm Forced to Become an Alchemist

Six-year-old Fran was playing when his mother suddenly came running over, picked him up, and carried him to a strange woman.

"This is my son, my very own. I'll trade him for a drop of Phoenix Tears."

"Deal!"

And just like that, Fran somehow embarked on the path to becoming an alchemist.

(The blurb may not be much, but the real story is where it's at.)