Hayato Yuzuki is the eldest son of the Yuzuki family. He is 23 years old. Hardworking family breadwinner. He is a history teacher at the school where his younger brother studies. Hayato is very kind, patient, authoritative, and very responsible for his family. He has 3 younger siblings, namely Mikoto Yuzuki, Minato Yuzuki, and Gakuto Yuzuki. Hayato really loves his three younger siblings. Hayato no longer has parents.