Is it inevitable or accidental that determines the fate of the universe?Or say: "God" plays dice?Cheng Jiajia woke up from the hospital bed and found that she had traveled back to the age of 18.But luck makes people feel like this, and this world... seems to be completely different from her past memory?My parents are not divorced and have a complete family of four.Dad, mom, myself and sister.At least on the surface.Many memories instantly poured into Cheng Jiajia's mind, which were hers, and it seemed not.Is it a butterfly that enchanted Zhuangsheng, or is it a butterfly that enchanted Zhuangsheng?