River City Behemoth

Seventeen-year-old girl Jiang Liuli witnessed the future person Mo Xin transform from a cat into a human. Out of curiosity, she asked her friends Wan Linlang and Hu Dake to follow Mo Xin to the underground city. In the dungeon, they were put into coffins, experienced flooding, burning, and fighting with skeletons wearing shrouds... What's more, there were spies hidden around them, behemoths that evolved in advance, numerous mechanisms, and dangers coming step by step... Can Liuli come back safely? How does her love with Mo Xin develop? Can she and her mother meet?