Cook the right rice for rolls according to the step-by-step recipe. Take a saucepan with a thick bottom, pour in the rice and fill it with water. Place the container on the stove on medium heat. Cover the saucepan with a lid. Bring the liquid to a boil and reduce the heat to low. Continue cooking the rice for 15 minutes. Remove the saucepan from the heat and remove the lid. Cover the container with rice first with a towel, then with a lid on top of it again. Leave the rice to infuse for 15 minutes.
Make the dressing. To make the dressing, combine the vinegar, salt, and sugar in a small saucepan. Heat, but do not boil, and stir thoroughly until smooth.
Prepare the rice for the rolls. Pour the dressing over the soaked rice and stir until they are evenly combined.