

Amberground backround info:
Amberground is the world in which Tegami Bachi takes place. The entire country of Amberground has no sun, with the only light coming from the man-made sun that rests over the capital, Akatsuki. The country of Amberground is split into three regions, with the brightest and the capital region being in the middle. Massive ring-shaped lakes separate the three regions and they can only be crossed if you take one of the bridges. To cross the bridges, you need to have a crossing pass, which allows you to cross between the regions. Crossing passes are acquired through hard work, and the government has gates and gatekeepers to regulate who goes where.
It is almost impossible to gain a crossing pass if you are a normal citizen.
Towns in Amberground and few and far between, and going from one town to another is extremely dangerous due to the presence of armored creatures known as Gaichuu. Because of this, delivering letter and packages are expensive and only carried out by the country's post men, nicknamed the Letter Bees. Though there have been attempts at establishing alternate delivery personnel, such as the Letter Pigeons, these haven't been nearly as successful.
Amberground Regions:
■Yodaka is the region farthest away from the sun, so they have about as much light as a full moon would give.
■Yuusari is the region in the state of perpetual twilight. The middle class lives here. The Bee Hive, the headquarters of the country's postal system, the Letter Bees, is also located here.
■Akatsuki is the captial of Amberground, the pinnacle of the Amberian Government. Access is strictly limited, and only the "Chosen Ones" live here. The brightest of all the regions. Instead of a bridge to cross to Akatsuki, there is a train that departs from Yuusari to Akatsuki.
((Backround info-Done. Next story))