oblesse manga Summary and Preview:

The story features a male protagonist named Cadis Etrama Di Raizel, also known as Rai. He appears to be around 15 to 17 years old in age, but he is a vampire or, to be exact, from a race of beings known as Nobles. Nobles distinguish themselves from vampires, whom they call mutants, by the fact that they do not drink human blood. Rai has been missing for 800 years, the exact cause of his disappearance is a mystery, and he suddenly wakes up in modern day South Korea.While in South Korea, Rai reunites with his servant Frankenstein by chance. Frankenstein, who's currently a director of a school, has been searching for his master since the time Rai has gone missing. Rai then enters school and tries to get accustomed to the modern times and technology but has no clue how modern society functions. His unfamiliarity with the 21st century is often used as comic relief in the series. The story revolves around him and his servant, Frankenstein. We also get introduced to other Nobles as well as some human organizations that are very powerful.
Full Series Name: Noblesse / 노블레스
Written by Son Jae Ho
Art by Lee Gwang Su
RAW Status: 123 chapters and ongoing
Translation Status: Noblesse chapter 84 and ongoing
Brief Description: After spending 820 years in a casket, a mysterious being wakes up in South Korea and finds that the world has changed greatly. He faces difficulties as he tries to adapt to the modern world and is even mistaken for a high school student. He doesn't seem to be the only immortal in the city, however...
Link to more Information:
Releases: http://www.mangachapter.net/537/noblesse.html
Note: This is actually a Korean manhwa/webcomic, so the format is quite different than what you may be used to. However, you'll find the quality stunning, and the comic is in full color! I'm actually translating this over at Mangachapter.