During September 2025, Tairi focused on front-end development within the FlutterKaigi/2025 repository, addressing a UI text issue in the Staff widget. Using Dart and Flutter, Tairi corrected a grammar typo in the section title, changing "Staffs" to "Staff" to enhance clarity and consistency for users. The change was implemented through a disciplined Git workflow, including code review and targeted regression testing to ensure minimal risk. While the scope of work was limited to a single bug fix rather than new feature development, the update improved the overall user interface quality and maintained high standards for code reliability and readability.