Towasa Ōmaki is the person to whom Akira Himegami confessed his feelings before entering cold sleep. Her current status and location remain unknown after the world underwent significant changes over the next two hundred years. The possibility that she might still be alive acts as the central motivation for Akira's journey. After he awakens, an android named Yūgure, who closely resembles Towasa Ōmaki, appears before him.