My Older Sister Is Too Dangerous, Yet I Can't Escape

The male lead, Shen Zhibai, is 20 years old, a college student with a gentle disposition but deep-seated emotional wounds. The female lead, Lu Wanning, is 26, a coolly beautiful, forceful, extremely self-controlled woman with an “older sister” air. On the surface, she is the daughter of a close friend of the male lead's late mother, but in reality, she has secretly protected him since he was a boy. They are not related by blood. Lu Wanning feels an intense possessiveness toward the male lead and wants to control him, but her “yandere” side isn't simply a matter of going crazy. It stems from childhood trauma, family control, and an old case connected to the male lead. At first, he thinks she just meddles too much. Later, he discovers that she has long since infiltrated every part of his life: his home, scholarship, part-time job, doctor, relationships with classmates, and even every dangerous situation he's ever faced, which she dealt with in advance.