We have developed a training "Dual N Back" game that trains the working memory required for studying and working so that you can continue. What is working memory? A place to temporarily store information in your head when your brain is thinking. It is said that if this area can be utilized, forgetfulness and careless mistakes will be reduced, and by extension, memory will be improved. What is "Dual N Back"? A memory test that is said to improve working memory. Memorize places, sounds, letter