Kenren Kaden

Hanainu are mysterious creatures that have the appearance of both humans and beasts. And there are people called Kasoshi, who hunt with these Hanainu as their partners. Kotona, an apprentice Hanainu, has a strained relationship with her current partner Seki due to a painful separation from her Hanainu in the past. Just as her chances of passing the upcoming promotion exam to become a Hanainu are in jeopardy, a vicious Hanainu has appeared, claiming many lives. It turns out that this is the same person who killed Kotona's former partner, Harushi --!?

(Source: Shueisha, translated)