Return - Miraculous Ladybug

Marinette and Adrien are childhood friends. Marinette develops a crush on Adrien after many years of being friends. They grew up together lovingly and were both brought into Gabriel Agreste's company. Marinette as an apprentice designer and Adrien as a model. In order to complete Marinette's training, she receives an offer from Gabriel to study abroad in America. Knowing that Adrien will not return her feelings and only considers her as a best friend, she does not hesitate and immediately takes the offer. What will happen to Adrien after his best friend leaves him?