The World of Otome Games is Tough For Mobs - Volume 7, Chapter 7 “Sisters Quarrel”

A dancer who was killed by a serial murderer found himself occupying the body and taking on the life of Brian Morse, a patient with anti-social personality disorder. As Brian, he has the look, he has the brain, he has the charisma, but he also has something that somehow always attracts psychopaths…[The story mentions 3 reality shows and crossovers with the American drama series Dexter. SLASH]

- Description from Novelupdates

[Special Containment Procedures]Calamity neared, and a special Containment Subject known as “Bonfire Company” awoke from its slumber, sending out invitation after invitation to join its ranks—“When The Night comes, there ought to be someone to light a fire, to illuminate in all directions.”At the same time, it also brought forth a prophecy.In the year 2044, at the end of a year, a dark disaster would descend from the heavens.

Elaina never anticipated discovering that her husband, the reigning emperor of the Kingdom of Luminiera, was unfaithful. To make matters worse, the one seemingly attempting to undermine their marriage was none other than her sister!Unable to confront this harsh reality, Elaina resolved to plan her escape and distance herself from her husband. However, a significant complication emerged while she was plotting her departure—she was pregnant with the emperor's child. Determined not to subject her child to the consequences of her husband's infidelity, she chose to flee with her child and embark on a fresh start in the neighboring kingdom of Darcero, utilizing her expertise in farming while also planning on raising the child that she will give birth soon all on her own without the need and support of a father.As fortune would have it, the gods appeared to favor her resolve. “Because the gods are impressed by your dedication, we reward you with a helper that will allow you to flourish in this land. In exchange, you help us grow plants that are not yet present in this world and spread them all over the world. Activating the Farm Helper. Welcome, host!”Now faced with the prospect of an entirely new life and the responsibility of her unborn child, Elaina must navigate the challenges that lie ahead. What trials and tribulations will she encounter as she endeavors to build a life for herself and her child in this unfamiliar territory?

God plucked one of his creations from his first Earth and gave him a second chance in another one of his Earths...surprise it is in DxD! Now reincarnated as a perverted side character how will our poor protagonist handle his new identity? Well he probably wont make the choices you will want him to, that's for sure!