Esposito is joining the Belgians on-loan after spending last season with FC Basel.
The 19 year-old admits he wants to continue his progress rather than sit on the bench at Inter.
He told Calciomercato.com: "I don't want to wait but I want to play, in any country. I would have done it in Italy, the offers are what they are and I'm brave enough to face a second experience abroad.
“I've said goodbye to (Romelu) Lukaku, he's very fired up. My goal remains to return to Inter."