YUZUKI-SAN CHI NO YON KYOUDAI.

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! (Source: Shogakukan, translated) — Description from AniList community (anilist.co).