Mbappe and Achraf maintain a great relationship, with the two men travelling to the Spanish capital early this month to spend a day together in the city.
"The teammates learned about it on the pitch," Achraf told La Resistencia.
"Me, as I'm friends with him, well... a few days before.
"The truth is that I've received messages from people who hadn't messaged me in a long time. They said, 'What's your friend going to do?' and when he stayed, they said, 'You're a b*****d.'"
The TV show host, David Broncano, asked the PSG right-back if he has a good relationship with the Real Madrid president and Achraf confessed that there is respect between him and Florentino Perez, but nothing more.
"Well, Tito Floren, cheer up," was Achraf's message to Perez.
"I hope you go for another great signing and good luck on Saturday [in the Champions League final]."