From CMX:
Kasche may have a talent for controlling beasts, but she's got a lot to learn about self-control before she can become a full-fledged summoner. When disaster strikes, her principal chooses her to avert it.
Joined by an unusual crew of allies both human and not, Kasche must recapture the relic from an evil summoner before she can use it to unlock the ancient Encyclopedia Verum and call up the most powerful monsters ever seen!

From manga-koekje:
Imagine a world full of flying dragons, talking mushrooms, burning forests, supernatural bisons and many more strange creatures... Well, Mondo, Rokuna, and Dr. Hiiragi go on some crazy adventures taking on lions and crazy monsters in hopes of creating a passageway between worlds so humans and monsters can live together.