My Little Pony: Guardians of the Eternal Freedom Forest

The ancient guardian alicorn Shuoye sacrificed most of his magic to seal the rift into the Chaos Realm. Though he still had magic, he was left terribly weak. Carrying loneliness and hidden pain, he lived in seclusion in the Everfree Forest for a thousand years. Then Fluttershy found him and gently lifted him out of the darkness, teaching this pony, who was used to being strong on his own, how to accept love at last.

(The blurb doesn’t do it justice, so please read the story.)

(One heroine × slice of life)

(The writing may not be all that good.)