The youngster returns to Southend United after a loan spell with the Millers.
Sewa was an instant hit with the Aveley fans, scoring on his debut against local rivals Tilbury in a 2-0 win. He then scored a late equaliser against Dereham Town helping the Millers gain a point against the highly placed Magpies.
Marah went on to make 9 appearances for the Millers. And everyone wishes him the best for his bright future with Southend United.