If I find a girlfriend, she has to be an otaku. Not some flashy, extroverted gyaru! How am I supposed to turn Kokoro Nishina into the ideal otaku girlfriend?! She’s not my type at all, but maybe she can help me—if I can survive her living with me!

After being reborn in the world of the otome game she'd been playing, Katarina realizes that she's the antagonist, who is either killed or exiled in every ending of the game! Now she must use her knowledge of the game and her own wiles to survive!