Guardian Girl

An immortal high school student, So-Yeong is secretly crushing on human golden retriever Hui-Jae. Mysteriously, he keeps coming into near-death danger and So-Yeong repeatedly sacrifices herself to protect him. Something begins to grow between the two, and someone doesn't like that. What will happen to their lives and fate?!

(Source: WEBTOON, edited)

Note: Includes one extra chapter.