When Su Wan woke up, she entered an old Japanese comic from the 1990s and became a stand-in who looked exactly like the male protagonist Bai Yueguang. The choice system is bound to her as soon as she opens her eyes, and the options at each key node determine her fate. Facing the gloomy and taciturn male protagonist Tetsu Fujino, who is full of white moonlight, she takes every step and just wants to live peacefully. But the entanglement of the evil bully Sakurai Takuma and the spread of malicious rumors on campus forced her to rely on the system to break the situation. One rainy night, she picked up the dying orange cat Xiaoju, and one person and one cat depended on each other. The system option pushed her to Fujino Tetsu, and she carefully acted as a substitute, but in getting along with him, she caught a glimpse of the tenderness under his gloomy appearance. When Bai Yueguang returned and the substitute's identity was in jeopardy, Su Wan discovered that among countless choices, Fujino Che's heart had already been tilted towards her.