Shiunji-ke no Kodomotachi

The Shiunji family, consisting of seven children, lives in a large mansion in Tokyo's Setagaya ward. Arata, the eldest son, often feels burdened by his five sisters and longs for a life independent of them. He spends his days dreaming of a future without their constant presence. However, Arata's life takes an unexpected turn when his father reveals a startling truth: Arata is not biologically related to his sisters. This revelation throws the family dynamic into disarray, forcing the siblings to re-evaluate their relationships and navigate the complexities of their newfound understanding. The anime explores how this shocking secret impacts their lives and the bonds they share.