As a lazy office worker, I was addicted to the smartphone otome game 'Love Blooms in the Demon World'. The game is a school romance in which the heroine, who is from a low-class demon race, develops a love with a handsome guy she is trying to conquer. I became so absorbed in it that I was killed in a traffic accident... Then, as if it were natural, I was reincarnated in the game. I thought I was reborn as the heroine! But for some reason, I had become the 'stand-in for the heroine' mob daughter, Zakuro, whose only role was to appear in the game with a name! By the way, this character is set to be instantly killed by the final boss at the climax of the game... I (Zakuro) want to maintain my comfortable life as a spoiled daughter, and of course I definitely don't want to be killed instantly. Using my innate knowledge of games, I raised my level to MAX and avoided all the 'instant kill flags' - Wait a minute! From the bad-mouthed genius good-looking boy to the cool, quiet assassin, I'm being liked by all the handsome guys, and before I know it I've managed to win over all the characters...! With a development that surpasses even the main heroine, what will happen next?