I Have A Dragon’s Heart is a Manga/Manhwa/Manhua in (English/Raw) language, Manhwa series, english chapters have been translated and you can read them here.
Sharon, a warrior who defeated a vicious dragon a thousand years ago. One day, an unidentified man appears in front of Aru, who grew up longing for Sharon. what? Are you that terrifying dragon? Besides, I’m that hero?! A cute and sad romance fantasy of a dragon and a hero who reunited after a thousand years!