Y/N finds herself stuck in KNY in an otome dating game! She must level up, earn/buy skills and complete missions. However, there is a twist. It is a dating game after all. She must collect love interests, and only when their interest level reaches 100, will she be able to exit the game. Although, the love interests may start acting weirdly...

When Y/N finds herself reincarnated into her favourite anime, Demon Slayer(Courtesy of truck-kun), she makes a promise to save all of her favourite characters from dying. Can she accomplish her mission and change the fate of the characters, or will she fail and take everyone down with her? While she is in Demon Slayer, the characters start going yandere for her...