Liam and Ninetails

So Ash and Misty (randomly together alone in a different region) come to a boy on his land that is tending to his Mareep with the help of his Ninetails named Fireball. The young man introduces himself to Misty as he finds her attractive based on the mere reflection of her too being a redhead. Misty is quite flustered and Ash takes notice but it doesnt hit him until he remembers the same situation with a dark Auburn haired Gym Leader almost taking the one person with whom he never realized he had feelings for until now.

You guys know this story...