[Machine Translation] Rebellion and puberty, when my sweet child suddenly becomes a different person. They are impulsive, lack concentration and perseverance, are vulnerable to temptation, and lose their temper easily. The cause lies in the incomplete teenage brain. While it is the golden age of plasticity and IQ, it is also susceptible to negative influences. Based on recent research, we can learn how to treat our children better. This book is a must for parents who are struggling to raise their children.