After their parents' passing, the Yuzuki family, comprised of four brothers, must navigate life together. Hayato, the responsible eldest, shoulders the family's burdens. Mikoto, the calm second son, harbors a soft spot for his adorable younger brother Minato, who is full of energy despite his clumsiness. Lastly, Gakuto, the wise fourth son, surprises many with his mature demeanor as a first-grader. Through the manga, we witness the brothers' interactions and challenges as they tackle everyday life in their family, school, and community.