Go Back in Time and Kill Yourself 28 Days Ago

I am Huai Yi, and I returned to 2007 because of an experiment. I have seen my biggest goal in this experiment, Li Xiang, who is still a young girl. What I have to do is to get rid of her within 28 days to avoid future troubles. I am Li Xiang. One day, a big sister suddenly appeared in front of me. She said she was from the future and wanted to help me. I have no doubts, because isn't this the standard configuration of every protagonist? The protagonist always gets help from friends from another world because of an adventure, and then passes through the obstacles and finally saves the world. So cool! When I was daydreaming about my future, I discovered one thing. Every time I asked her about my future, she always looked at me in a daze, looking a little disappointed and a little sad. I couldn't help but fall into self-doubt. Is my future a different version so she comes to correct it for me? An unexpected encounter, my unspoken thank you and goodbye, did you hear it? Intention: I miss you to death. But I think you are alive.