The bride & the excorcist knight Series by Keiko Ishihara

MONSTER-IN-LAW!Anne has spent her whole life being menaced by demons, but things have gotten a little easier since 12-year-old exorcist Haru Vellman took her in. Now Anne must face her scariest foe yet…Haru’s family! Dorothea, the head of the Vellman clan, sets down a challenge for Anne: if Anne can exorcise a demon that’s been lurking in a nearby convent, Dorothea will approve of Haru and Anne’s engagement... moreMONSTER-IN-LAW!Anne has spent her whole life being menaced by demons, but things have gotten a little easier since 12-year-old exorcist Haru Vellman took her in. Now Anne must face her scariest foe yet…Haru’s family! Dorothea, the head of the Vellman clan, sets down a challenge for Anne: if Anne can exorcise a demon that’s been lurking in a nearby convent, Dorothea will approve of Haru and Anne’s engagement. However, since men aren’t allowed inside the convent walls, Anne will have to do it alone, without Haru’s help… less

FINAL SHOWDOWN!Now that Anne and Haru have the approval of the Vellman family, Haru wishes to ask Anne’s parents for their blessing. But Anne’s family turns out to be the least of their worries once Mephisto shows up, intent on finally making Anne his bride! Will Haru and Anne defeat him and live happily ever after, or will the true nature of Anne’s curse tear them apart?