My Closet Connects the Past and Present, and I Protect a Village in Ancient Times

Su Ran accidentally passed through a wardrobe into the ancient world, where she learned about the state of the realm: a corrupt imperial court, famine everywhere, and wars raging on all sides. The villagers were struggling to survive, so she decided to use her ability to travel between the two worlds to help them build tunnels where they could shelter from the fighting and protect a patch of peaceful ground.