Bride of the Barrier Master, Vol. 3 (結界師の一輪華 [Kekkaishi no Ichirinka] (Novel) #3)

Hana’s had her hands full. She’s keeping her husband’s advances at bay, sent a terrorist organization packing, saved the school from destruction, and rescued her twin sister from the clutches of their terrible parents! At this point, flying under the radar is simply impossible. News about her has spread far and wide, finally reaching the ears of an Obsidian rank practitioner named Yukizasa Sankourou. He’s an old friend of Saku’s and is vehemently opposed to his buddy’s marriage to Hana. He won’t stop at just voicing his opinions either, he’s willing to meddle and he’s not above teaming up with the Ichise parents in their continued efforts to get Hana out of the picture.