The Brazilian midfielder joined City last summer, penning a five-year deal to complete a move from Rio De Janeiro outfit Fluminense.
A Brazilian youth international who was both their youngest ever debutant and youngest Copa Libertadores goalscorer, he made 13 appearances for our EDS side last season, scoring six goals and assisting four as we successfully defended our PL2 crown.
He made his senior debut in our FA Cup win over Swindon Town in January, before making a further appearance for Pep Guardiola’s side as a late substitute in our 4-0 Premier League win over Norwich in February.
The 19-year-old will now continue his development in the Portuguese Primeira Liga.
Everyone at Manchester City wishes Kayky all the best with his loan move.