Wolf Guy is a manga serie of 5 volumes (ongoing) made by Tabata Yoshiaki (author) and Yugo Yuuki (artist).

Ms. Aoshika is not only divorced, but an underappreciated teacher at her job. But one drunken mishap leads her to witness firsthand the brutal assault and murder of a young man. However, after fainting, she awakens to discover that all of the assailants have been seriously wounded.

And to her further surprise, the next day she discovers that not only is the young man Akira she met the night before alive, but he is now her new transfer student.
From mangaupdates

• Associated names : ウルフガイ -狼の紋章, Wolf Guy - Emblem of the Wolf, Wolf Guy - Wolfen Crest.
  
• Made by : TABATA Yoshiaki (author), YUGO Yuuki (artist).
  
• Genres : action, adult, fantasy, mature, seinen, surnaturel.
  
• Year : 2007.

My judgement : I find it good and I wait for the next release ^^

A little hard to understand but I like it