My Happy Marriage Novel Volume 4 is written by Akumi Agitogi with illustrations by Tsukiho Tsukioka.

On the way back from Kiyoka’s parents’ villa, he and Miyo narrowly escape an ambush at the hands of an assailant who refers to Miyo as their “daughter.” So, in an attempt to keep herself safe, Miyo accompanies Kiyoka to his workplace and meets a female soldier named Kaoruko. It is revealed that Kaoruko was previously Kiyoka’s fiancé candidate, which causes complex emotions to swirl in Miyo’s heart. Can she look beyond their shared past? Or will the distraction leave her vulnerable to a hidden threat making its way towards her…?

My Happy Marriage Novel Volume 5 is written by Akumi Agitogi with illustrations by Tsukiho Tsukioka.

After the Gifted Communion stages an operation in the Imperial Capital, crown prince Takaihito proposes that Miyo and Kiyoka start living in the Imperial Palace. There, Miyo finally realizes that she’s fallen for Kiyoka, only to find that her fear of change is holding her back from expressing her feelings to him. But things reach a crossroads one night when Kiyoka comes to Miyo with a confession of his own…

My Happy Marriage Novel Volume 6 is written by Akumi Agitogi with illustrations by Tsukiho Tsukioka.

Kiyoka has been imprisoned, and Miyo takes it upon herself to rescue him by whatever means necessary. But when she arrives at military HQ, she comes face to face with a stunning young man...who looks exactly like Kiyoka. Claiming to be Kiyoka’s familiar, he takes Miyo back to the Usuba household where she decides to turn over a new leaf-by carving her own path to reuniting with Kiyoka.