Kage ni Saku Hana

From Mad Hatter Scans: In the peaceful period of the early Edo period, people lived in fear of Shadow Beasts that consumed the heart of the people. Exorcists and hunters use their abilities to rid of the beasts, and when a young exorcist named Hibana, puts herself in a reckless battle against the Shadow Beasts, she is rescued by lone Hunter, Tsugumi, causing the beginning of a romantic adventure.