The heroine is called Sayako Miyamura. By day, she was known as an honor student, well-liked by her classmates, and admired by many. However, as the sun set and darkness enveloped the streets, a different side of Sayako emerged. One fateful night, Sayako found herself caught in a heated argument with a group of guys. Etou, a classmate who secretly harbored feelings for her, happened to pass by. At first, he contemplated ignoring the situation, pretending not to care. But something inside him urged him to intervene. In a moment of bravery, Etou reached out and clasped Sayako’s hand, and together they fled from the scene. It was during this encounter that Etou caught a glimpse of a side of Sayako he had never seen before. She was still Miyamura Sayako, but a hidden personality had been lurking beneath her daytime facade. This alternate persona, the “rebellious night girl,” was crafted by Sayako to maintain her good-girl image during the day. But when darkness fell, she shed her polite and well-behaved demeanor. Instead, she became a rebellious, outspoken, and uninhibited version of herself. Her language just like a thugs.