Uchi no Otouto-domo ga Sumimasen

During spring break after her first year of high school, Ito learns that her mother is remarrying and they will be moving into a new home. She expects a stepfather and plenty of change, but not four younger stepbrothers suddenly waiting under the same roof.

Ito decides to do everything she can to become a real older sister despite their different personalities and the chaos they bring into her days. The hardest to understand is Gen, the eldest brother, who keeps her at a distance. Small moments gradually reveal kindness and responsibility behind his cold manner. As strangers slowly become family, Ito learns that a new home is not created by a legal name alone, but by the ordinary days in which everyone learns how to live together.