But it was only after Yan Fei's memories from the future had fully recovered that he realized the man standing next to Lu Pingping was actually himself, and the scene where Lu Pingping talked to the past Yan Fei earlier tonight. For some reason, the past Yan Fei had forgotten all important memories but remembered this trivial scene, mistaking it as Lu Pingping with her boyfriend...
When Lu Pingping discovered this resurfaced memory, she tried to interpret it with a scientific mindset, thinking it was caused by two identical souls in the same time and space, which resulted in an overlap of memories. She even explained the disappearance and recovery of their memories based on cause and effect.