Shini Yasui Kōshaku Reijō to Shichi-nin no Kikōshi - Chapter 27: Island of Messenger (part nine)

Heed my call! O’ Dragon of Eternal Sin, the Progressive Disaster, the Forerunner, the Land of Eternal Peace, the Flames of Soul Burning, He Who Owns The Deep Soul, the Sound of Origin, the First Cause of All Things, the Principle of Circles… o’ great Negary, your servant calls for your return!

[sweet, pampering][strong FL, 1v1]He was an absolute noble, decisive and cold-hearted, yet he was persistently entwined with her, doting incessantly.The first time they met, he questioned, “Six years ago, was it you?”The second time they met, he was holding a paternity test, “You still dare to say your son isn't mine?”The nth time they met, she finally lost her patience, “Sir, will you ever give it a rest?”The man lifted the corners of his mouth, smiling with a deep and enchanting charm, “Not before our second child is born.”

mc gets transmigrated to Fallout New Vegas with the merchant system. let the questionable adventure begin.

Beings that create and control monsters and demons, beings that build and reign over malicious labyrinths, the chosen individuals to possess an overwhelming Unique Skill… They are the Demon Lords.