Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
Ethics and Morality
You will be happy just by reading it! Work, money, human relations, love and everything will be as you wish! It will scientifically overturn your common sense! It contains all wonderful behind-the-scenes information that "makes you happy scientifically" backed by the latest brain science and psychology! It is full of surprising new facts such as "even if your annual income doubles, your happiness level will only rise by 9%".