Lucifer and the Biscuit Hammer Vol. 3-4

She wants to save the world...in order to destroy it! Amamiya Yuuhi's quiet life came to an end the day a talking lizard appeared in his home and demanded his help saving the world. Since then, Yuuhi has accepted his role as the Lizard Knight, eager to serve his princess, the spunky Asahina Samidare, any way he can. Yuuhi and Samidare find an ally and mentor in the Dog Knight whose abrupt death leaves them reeling. Now they must deal with his younger brother, another Beast Knight whose obsession with Samidare and predilection for fighting make him a wild card beyond control.