The 18-year-old right winger is leaving ES Sétif for the Belgian second tier side – but it is only step one of a three stage plan for him.
The Manchester City linked City Football Group own Lommel and Ishak is their investment.
And they plan for Boussouf to stay at Lommel for one season after which he could move to Dutch giants PSV Eindhoven.
Finally, if his growth continues he will transfer to Manchester City in his third season in Europe.
Ishak has been compared to City superstar Riyad Mahrez and the English club may have found a successor.
An Algerian under-20 international, Boussouf now has the chance to rise to the very top of European football.