His alleged strained relationship with Neymar is believed to be one of the biggest reasons for him having taken this decision, with the Frenchman feeling underappreciated in comparison to the Brazilian star.
Mbappé and his entourage believe that Neymar's continuous issues and injuries should mean that the 20 year-old becomes PSG's key man, with the 36 million euros a year that Neymar earns in comparison to the 13 million that Mbappé earns doing nothing to help the situation.
According to newspaper 'ABC', Mbappé's father and agent Wilfrid is now looking to engineer a move away for the forward, with Real Madrid being his preferred destination.
Real Madrid, for their part, prefer to stand aside and not start a full-blown conflict with PSG, as tensions between the two are already high after constant rumours linking the French club's stars with moves to Madrid.
This is not the first time that Mbappé has been linked with a move to the Spanish capital, as Real reportedly wanted him when he was at Monaco, before PSG skipped the queue and stole him away in a controversial transfer in France.
The perennial French champions managed to, with Mbappé's signing, create a lethal front three of Neymar, Mbappé and Cavani. However, this attacking trident could now be torn apart after just two seasons together - two seasons in which Mbappé has shone.
The young striker reportedly wants to join Real despite looking fed up when asked about a move to the Spanish side after France's friendly with Bolivia.
Now, with idol Zinedine Zidane's return to the Madrid bench, Mbappé wants to make the move over to Spain. However, with the whole summer left, anything could happen, and it remains to be seen if Real are willing to pay the 280 million euros that it would take to sign Mbappé.