Whisk 108 g of water (3) with gelatin and keep in the fridge for 20 minutes. In a small saucepan, Cook water (1) with sugar (1) until it reaches 230°F (110°C) to make a syrup, remove it from heat. In another saucepan, bring to a boil whipping cream, water (2), and sugar (2) and add syrup to it. Bring everything to a boil before adding gelatin. Pour onto dark chocolate chopped in small pieces. Mix with an immersion blender to get a perfect emulsion. Cover with saran wrap. Let it rest in the fridge for at least6 hours. Heat up to (75°F) 24°C in a double boiler or microwave and mix with an immersion blender before using it. Unmold your frozen entremets, place it on a flat surface such as a metal grid to allow for the glaze to flow on the outsides of the mousse cake. Immediately pour your glaze at (75°F) 24°C directly on the mousse cake. Immediately use a spatula to remove the surplus glaze on top of the cake. Once the glaze stops dripping, remove the glaze at the bottom edge of the cake. Place it on a cake board and allow it to thaw in the fridge for at least 8hours. For optimal taste, remove it from the fridge 30 minutes before serving. Otherwise, always leave it in the fridge and eat it within 2 days.