Merusha, the protagonist, is an ordinary noble lady attending a noble academy with a fiancé. However, her life takes a drastic turn when a woman claiming to be the heroine suddenly appears and forces her to bully her, threatening to harm Merusha's beloved cat if she doesn't comply. From that day on, Merusha becomes an instant villainess, bullying the heroine as instructed, all while watching the heroine's reactions. 'Laughing loudly is so embarrassing... but for the sake of my cat, I'll do my best to bully... even though it hurts my stomach.' Her fiancé is smitten with the heroine, and she has no friends left. Her only companions are now the cat and a priest. Merusha's youth is in shambles. As the final event, the graduation party, approaches, the heroine becomes even more tyrannical. However, there is someone quietly watching over this villainess—