After I Transmigrated into a Book, I Matched the CP and the Villain

Zhang Yishu transmigrated into the role of a passerby. She never expected that she would not only get to watch the protagonist act crazy, but also bring the heroine together with the devoted second male lead, become friends with several villains from the book, and be adored by the protagonist's whole group. Who could have seen that coming? The person she casually saved turned out to be a villain who can't stop clinging to her. But life rarely goes as planned. In order to save them, she eventually returned to the real world, leaving behind the person she loved most. After she went back, her lover...