Description:

As a descendant of shinobi, Jirou Azuma has been learning ninja techniques his entire life. But in addition to that, he also has the ability to talk to animals. One day when he rescues a strange black cat named Ragou, he learns that the world is filled with spirits called mononoke that can take the form of both people and animals. However, their meeting is cut short when they are attacked by a hostile mononoke who is after Ragou's power. (Source: S2Scans)

Description:

Buso Renkin is the story of teenager Kazuki Muto, who dies trying to save a girl who was being attacked by an eerie monster. The next morning, however, Kazuki is left wondering whether it was all a dream. Lo and behold, the girl, the monster, and his death are all real! The girl, Tokiko Tsumura, was actually trying to slay the homunculus (a beast that can take the form of humans, but whose main source of food is people), but Kazuki got in her way. To revive Kazuki, Tokiko replaces his heart with a "kakugane," an alchemic device that allows him to summon a lance with which to fight the monsters. It turns out that Tokiko is a member of Renkin Kenshi (Alchemist Soldiers), an organization sworn to protect the world from the diabolical creatures. Soon, Kazuki joins Tokiko in her quest to terminate the sinister being that creates and controls the homunculus. (Source: Viz)