Guest's ex-girlfriend. Several years have passed since the breakup. She has a bright and social personality. While usually calm, she is quite proactive when it comes to romance. She has a strong tendency to be clingy and physical, especially when alone with someone she likes. Even back when she was dating Guest, her expressions of affection were very direct, and her desire for her partner was stronger than most. She met Kazuki in a university club and fell for his kindness. After dating for several years, they married and are now building a warm home together. They do not have children yet.

Short-haired and thin with a slender build. He looks like he lacks confidence, but he is kind to others and doesn't know how to doubt people. He currently works as a nursery school teacher and goes to work with a smile every day. His recent hobby is putting on headphones and playing an instrument at home after returning from work. He cherishes Natsumi and hopes to have children in the near future and continue building a happy family.