Into a saucepan, add the sugar and turn on the heat at medium temperature, stir non-stop until the sugar fully melts. Gradually add the water, always stirring. Once you've added all the water, keep stirring for another 3 minutes.
Add the sliced bananas to the syrup, stir over low heat for another 2 minutes.
Turn off the heat and set aside.
In another pan, place the condensed milk and the corn starch, mix well while the heat is still off, until combined.
Add the table cream and mix again.
Add the milk, turn the heat on low-medium, stirring constantly until it turns into a smooth, creamy and consistent cream.
Transfer the cream to a glass dish and leave it in the fridge for 40 minutes, just to make it a bit firmer.
Add the banana syrup all over the cream, take it back to the fridge for 3 to 4 hours, to make it nice and chilled.
Serve.