The Lord's Martial Art Chronicles

In an alternative timeline where the samurai didn't disappear after the Meiji Restoration, a rising tide of ghosts—commonly called samurai spirits—assails modern-day Shinjuku, Tokyo. These spirits frequently possess the bodies of the living and then go on rampages. The young lord Teruie, whose domain is Shinjuku, sets out to battle the spirits at the request of his classmate and subject, Mijuu, however... This is the start of a historical modern-day drama that follows the journey of a young feudal lord living in the present!

(Source: Comic Walker, translated)