A class observation day was scheduled to be held in Gaku's class. However, Gaku was worried that if Hayato took a day off to attend, it would cause inconvenience at his workplace and increase his workload.
The Yuzuki family consists of four brothers: Hayato, Mikoto, Minato, and Gakuto. The eldest son, Hayato, happily lives every day to the fullest. There are tears, laughter and excitement at home, at school, and in the neighborhood!