After the mission was completed, the yandere boyfriend turned evil

The villain was sent to a mental hospital by the protagonist. The bad news is that Jiang Yan is bound to the system and has to capture the villain and get him out of the hospital. The good news is that the villain treats her differently. For example, he never gets angry with her or complains about her. On the contrary, he only hugs her waist, murmurs about how uncomfortable he is over and over again, and presses her down on the bed, asking her to help him. Just when Jiang Yan thought she had succeeded in capturing the villain and was about to get him back on track, she discovered that the villain's admission to the mental hospital was just a self-directed and self-acted scene. ...