Everyone has habits. Someone people have a habit of biting their nails or touching their hair. They are not really conscious of their habits, but you often notice your friends’s habits, don’t you?
The story of “How do you crush an egg yolk?” is that the main character is bothered by how to eat. People have different habits when they eat and some people eat in a strange way. That is a tiny problem but a very big problem for him.
The story seems weird but you will see Japanese culture, such as Japanese food and Japanese lifestyle. If you don’t know how to eat Japanese food, the anime will help.