Great Tsia Mountain Tunnel

The Great Tsia Mountain Tunnel is a branch dungeon through Tsia Mountain. People can go through it if they pay. The money belongs to Keima and Rokuko. Although it is a dungeon it doesn't have any monsters.

Structure
If you go into a small room right next to the entrance and pay some money, you can go through the tunnel to the other side of the mountain. It’s more like a business than a dungeon. The tunnel’s wide enough for two carriages to pass each other by, and there’s even a convenient resting spot midway through it. Seems so perfect it is kinda fishy.