Aoi Kirishima

Returning from her college studies in Tokyo to complete a student teaching internship, Haruto’s older sister is far from the responsible sibling. Despite her role as an educator, she is incredibly lazy, a heavy smoker, and leaves a messy trail of chores for her brother to clean up. While she previously shared a dormitory with Haruto, she now enjoys a more carefree lifestyle, often meddling in his romantic life by favoring his connection with Yuzuki over Nanami.