Gray Swaying

My childhood friend Yunyuan appeared in front of me again ten years later. Just when our relationship was deeply rooted, Yunyuan disappeared inexplicably. A week later, news came that Yunyuan had died of illness, and one accident after another made my world darken. I accidentally collided with a car, and my parents both crashed. What seemed like a tragic accident turned out to be a well-planned conspiracy. What was the purpose... A year later, I was devastated and met a boy who looked exactly like Yunyuan by chance. Under the identical face, there was a completely different personality. Who is he who claims to be Yunyuan's twin brother? Not long after, there was a scene where Yunyuan came back from the dead and his twin brother disappeared out of thin air. Is this a fact or an 'illusion'? A series of unexpected events kept me alert. As the mystery is revealed bit by bit, an earth-shattering family conspiracy emerges...