The Celestial Returned from Hell

Once Earth made contact with the "Abyss", it quickly became the target of powerful demi-gods called "celestials" bent on plundering the planet for its resources and followers. Thankfully, Earth has a protector in the newly birthed celestial, Yeonseung. The problem? He's currently stranded in the Abyss! Can he make it back in time to protect the planet he once called home?