It’s hard to guess the exact date as this was dropped by translators a couple of times, however it should have completed 2012.
Available on mangafox here
The story is about a family of Vampires (called Mondlicht in this series – German for Moonlight) who are trying to survive secretly in society. In order to survive though, they kill tourists visiting a “haunted” hotel, passing it off as the supernatural. However, they are suddenly hunted by something called homonculi. They are humans who have been revived and modified, whose soul purpose is to destroy homonculi. All except one, code named F11 (real name Princess Marie) who was previously turned into a Mondlicht, and is suddenly awakened to protect her fellow Mondlicht.
In terms of Yuri content, Some have very clear Yuri pairings. Most, dont. Most Homonculi are based off of historical figures, such ass Marie Antoinette, and the two legendary pirates Anne Bonny and Mary Read. Only a couple confess their feelings fully. Any kisses between them are limited to side pairings (sex as well, although it attempts to get sexual with the main pairings. It’s the ecchi talking though)
Art however, is quite beautiful. It’s extremely detailed and all the F women are super duper pretty. Their appearances….easily forgettable though, but at least it was pretty to look at.
Overall, this is in fact an action storyline with sprinkles of ecchi/fan service (and nekkidness) in chapters. The storyling is quite fast paced and short for an action manga. Again, the characters and story line, it is fairly forgettable.