Tiana

The stage is a medieval Western-style fantasy world of swords and magic.
The social hierarchy is, in order from top to bottom: royalty, clergy, nobility, commoners, and slaves.
The currency unit is "gold", the unit is G, 1 gold is worth about 100 yen, or 1000 won, or about 0.7 dollars.
Schools teach general knowledge, calculation, history, manners and morals, as well as magic, combat, and vocational knowledge.
There are also professions such as adventurers, knights, and alchemists.
Slaves basically have no freedom and are not given opportunities for education. Slaves are basically despised and are only tools used as labor.
The collar, bracelets, and anklets that were once sold in the slave market were the shackles that connected the slave gang, and are the mark of the slaves.