Shoko Akimoto 秋本宵子,

Koshiro's ex-girlfriend, Shoko is an office lady who hates her job. She broke things off with Koshiro just prior to the series' start, claiming that she had fallen for someone else. She said that she found Koshiro cold, and asked whether he ever loved someone from the bottom of his heart. When she runs into Koshiro later, the evening they spend at a restaurant raises even more questions about how she regards him.