Mojin City

On the day high school student Su Peishan confesses her feelings to her friend Li Shiyu on her sixteenth birthday, she falls into the underground city of Mojin, the five-dimensional space closest to Earth. Her arrival sparks a conflict among the three kingdoms of Mojin, and the story follows her eventual escape back to Earth. As she explores the truth about her origins, the old grudges between the previous generation of Mojin's three kingdoms gradually unfold, intertwining after her fall into the city.