Shion Shiunji

As the second son of the Shiunji family, he is the fraternal twin of the fourth daughter, Minami. Possessing a maturity that surpasses his peers, he tends to observe the interpersonal dynamics within the household from a detached perspective. Handsome and socially active, he is in a steady relationship and frequently offers romantic guidance to his elder brother Arata, who struggles with social situations. Upon learning that the family members share no blood ties, he became the most proactive among the siblings in searching for clues about their biological parents.