The 21-year-old joined Palace from the Lions in January 2025, but now heads back to the club whose academy he graduated from.
Esse has played 17 times for Palace in all competitions and notably scored on his debut against Brentford at Selhurst Park, whilst also playing twice in our successful FA Cup run of 2024/25.
He spent the latter half of last season on loan at Championship winners Coventry City, where he scored twice in 18 appearances.
Everyone at the club wishes Romain well during his loan spell.