Shadows of the Deep Space - Chapter 1 - : Abyss Approaching

A side story series featuring the girls of Kyoukai Senjou no Horizon.

Vergil, a 21-year-old young man, leads an apparently simple life in a somewhat troubled world. His family is also simple—although his father is no longer alive, his mother has always been by his side, despite being a bit... aggressive. But that's not so unusual nowadays, right?Everything changes drastically when Vergil, after an unexpected death, awakens as a demon. To his surprise, he discovers that he has accidentally married beautiful Pure-Blood demonesses.Now, he will discover how the world really works from a Demon's perspective.

This is a story about a badass,

She was the Eldest Legitimate Daughter of the General's Mansion, treacherously harmed and died a miserable death. Perhaps moved by pity, heaven granted her rebirth. She returned to four years earlier, not only possessing heterochromia that allowed her to see what others couldn't but also equipped with a portable space. She vowed to make those who hurt her and her mother pay in this life.He was a Prince with a Different Surname from Moli Country, holding military power and commanding awe in all directions. It was said that he had conquered most of Moli Country, and even The Emperor showed him deference. Legend had it he was a bloodthirsty prince who killed without blinking an eye.One day, she encountered a ragged but handsome man on the street, who chased after her, shouting, “My wife, my wife.”The woman said, “Damn it, who is your wife? Aunt isn’t even engaged yet! Go where it’s cool and stay there.”The man responded, “You are my wife, and I've decided to follow you for life.”“A feel-good story, both leads are strong, a pampering love story with 1v1 romance.”