"80% of the world doesn't matter: A way of thinking to change a life that doesn't go well even if you try hard" Popular VTuber, Professor Kanae's "Teq-too Technique" for living a balanced life. Read once. Has a book cover. - Title: 80% of the world doesn't matter. - Author: Professor Kanae of the Criminology Classroom - Price: 1650 yen - ISBN: 978-4-7980-6608-0 #80%OfTheWorldDoesntMatter #ProfessorKanaeOfTheCriminologyClassroom #SNS #ProfessorKanae