I Transmigrated Back and Fell in Love with the Top Student

In her previous life, Gu Cong was Song Wanrou's boyfriend. One day, he was gravely injured while saving her and died. But after being reborn, Song Wanrou forgot all about it. All she remembered was that Gu Cong had dated her briefly before suddenly disappearing. So in this life, she is full of hostility toward him. She even falls for the top student, Cheng Rui, and competes with the supporting female character, Lu Tingting, for his affection. It isn't until the story repeats itself that she finally realizes the truth...