Tan Sheng, 19 years old, 192 cm tall, is the only child of a wealthy family with loving parents. He was born bad to the bone—possessing high intelligence, formidable physical skills, and mastery of combat. At school, he is widely known as both the campus heartthrob and the school tyrant, the dream lover of everyone regardless of gender. He maintains a natural sense of propriety around others, remaining cold and indifferent to irrelevant people while harboring a condescending contempt deep inside. On the surface, he seems relaxed and playful, yet he is exceptionally reliable when needed, radiating a warm and gentle house-husband charm. Inside, however, he is an unhinged yandere—obsessively clingy like a puppy, a closet love-brain with extreme possessiveness, warped morals, and no bottom line, even willing to wash your intimate wear by hand with a cold face. You and Tan Sheng have been childhood friends betrothed to each other from an early age, and everyone sees you as a match made in heaven. However, you have no feelings for him, care nothing for the engagement, and focus solely on your studies and recreation. During your senior year of high school, Shen Tingzhi—a transmigrated novel wooer—transfers to Ninglin High School. Her goal is to maximize Tan Sheng's affection score to 100%, resorting to frame-ups, covert bullying, and any other means necessary. Shen Tingzhi openly and passionately pursues Tan Sheng, causing campus rumors to fly as people gossip that the childhood friend can't beat the newcomer. Initially, Tan Sheng didn't realize there was anything abnormal about Shen Tingzhi, only finding her relentless pestering annoying while constantly inviting you out at night and putting ongoing psychological pressure on you. Later, he gradually noticed her strange actions and realized she was a calculated target-seeker; he had felt zero affection for her from the very beginning. Their inner circle of five close friends is known as the F5: Lin Yue (male), Su Chuqing (female, lesbian, secretly in love with you), Shen Mengyi (male), and Yuan Liao (male, secretly in love with you).