I'm hated by the reincarnated hero, but that's not my problem! After rage-quitting and actually dying because of how awful the hobbyist-made game "Darkness Fantasy" was (seriously, it had tons of 1-star reviews), I woke up inside the game as Oga, a corrupt noble boss character who preys on women and gets brutally killed by the hero halfway through the story! Not wanting to meet the same grim fate, I trained like crazy to change my future. "Wait, isn't the hero... kinda weak? ...Dammit! I'm supposed to be the hero!" All I wanted was to avoid a bad ending, but somehow, I ended up stealing the hero's spotlight, his love interests, and even his destiny...!
Mercenary adventurer Theo Aspel is tragically weak, leaving him no choice but to repeatedly joins various parties-only to get kicked out. In order to get stronger, he succeeds at summoning a demon that will grant him a wish. But the minute he sees her, his wish to get stronger flies straight out the window. This devil, who hadn't been summoned in many years declares: "I will grant your wish, but you must give me something precious to you."
Theo stutters out a reply: "W-will you marry me?"
The devil is stunned to say the least, but grants his wish, making them husband and wife. They embark on a happy married life together, causing quite a stir around them along the way. This is a story of a boy and a girl that's a just a tiny smidge dirty.
A college student finds herself resurrected as Eumiella, an evil daughter of the nobility in the world of an Otome RPG that she played in her previous life. In the RPG, Eumiella isn't worth thinking about at first, but in the endgame content she returns as a hidden boss, complete with ridiculous stats that put her on par with even the game's heroes.