Call me the softest sister, act the sweetest coquettishly, and be the biggest villain
Demons are rampant in this world, and humans can only survive in the cracks, and the biggest villain at the moment is the Demon King.
Hostess: Does this mean that I can only go back after defeating this demon?
System: No... No... You are needed to influence him and prevent him from going dark and falling into the Shura ghost realm. Shura ghosts live by killing and watering their lives with blood. They are the most terrifying existences in the three realms! Remember you only have two years.
Okay, okay, for the sake of this world, the heroine reluctantly agreed (forced to have no choice).
After some time
Heroine: The villain is so awesome! Can I join the villain camp? I don't want to reform him anymore. If I continue to reform him, I think I will die...
System:? ? ?
…
Heroine: Junior brother! You are so awesome! Don't... Stop practicing, you are already the best now!
The villain's yandere and sinister junior brother: Sister is so happy, I have to practice even better!
Heroine: ...(No matter how powerful you are, no one will be able to beat you...)
System: Danger...
Intention: I don't know where the love comes from, but it goes deeper and deeper