Hayato Yabe is Mire Yoshizuki's junior colleague at a trading company, positioned one year below her. Having worked alongside her for two years, he harbors romantic feelings toward her. When Mire is demoted and transferred to another department, Yabe takes over her duties. He reacts with indignation to her reassignment, interpreting her composed response as potential resignation, though Mire states she isn't quitting immediately. Later, after Mire decides to leave the company due to workplace mistreatment, Yabe confesses his feelings for her. This confession occurs as part of Mire's storyline resolution. Details regarding his appearance, family, or activities outside his interactions with Mire are not provided.