Uchi no Otouto-domo ga Sumimasen

During spring break after her first year of high school, Ito learns that her mother is getting remarried and they have to move to a new home. To her surprise, she also gains four younger stepbrothers in a night. She wanted to become a caring older sister; Ito does her best to adjust to her new family. She builds a great relationship with everyone; however, the oldest brother is quiet, distant, and not easy to understand. As they spend a lot of time together, Ito comes to know that Gen is a gentle and kind-hearted person behind his cold nature. Their growing bond led to a heartwarming family story and emotional moments.