Cross X Regalia summary:

On the corner of Chinatown, the two of them crossed, The boy's name is Inumi Haserou, high-school bodyguard who takes 1000 yen for each trouble; the girl's name is Nata, self-styled Sage who mysteriously collapsed in the back alley. Deciding to protect Nata, Haserou would have to face the sudden change in his daily peaceful life, as a group of Vampiric beings who consumed people's Ki, called [Demonic Sage] start to attack them. Their purpose: to hunt Nata, who holds the key of the powerful weapons capable of turning them powerless! Comicalization of a new series written by the Author of Rental Magica, starts here!