Light Novel/Volume 3

Volume 3 of was released in Japan on September 1st, 2017 by Hobby Japan. It was later picked up and officially translated in English by J-Novel Club on December 18th, 2018.

Summary
The castle has become lively with the addition of a butler and a daughter, and as Zagan and Nephy's awkward days continue, Nephy is suddenly attacked in town. And the one who attacked her... is a girl who looks identical to Nephy, but with dark skin?! Immediately following that incident, Zagan receives an invitation from an Archdemon to an evening ball on a boat?! The residents of Zagan's castle head off toward a luxurious party, fully aware of the danger!

Chapters

 * Prologue
 * Chapter 1: I'll Get Angry Even if the Only Who Raised Their Hand Against My Bride is a Beautiful Girl
 * Chapter 2: A Cruise Can Create a Good Atmosphere
 * Chapter 3: Naturally, Any Archdemon Will Have a Horrendous Personality
 * Chapter 4: Since the Stars Seem to Be About Fall, I Thought I'd Try Dancing A Little
 * Epilogue

Bonus Short Stories

 * Memories of the Collar
 * The Elf and the Collar
 * A Present for the Small Dragon