Bullet Butlers

There are various races living together at Ocelot City. Land, who lives as a mystic one, is one of the most famous citizens there. Rick, the main character is a butler and works for Selma. Selma lost her ability to transform herself into a dragon after a certain accident and is always depressed that is one of his concerns, but he somehow enjoys his life with his friends and other butlers. One day, Land is assassinated by someone unknown, and their life turns around 180 degrees.
(Source: VNDB)