Nene and Hanako have a trusting and caring relationship. After their fates were entwined due to the mermaid scale, Hanako made Nene become his assistant in return for granting her wish. She started cleaning the toilet after school since that. She complains about doing it and tells Hanako that she doesn’t like it, but Hanako says he looks forward to it every day. He feels nostalgic, and says it feels like having a friend. Nene then calls him Hanako-kun instead of Hanako-san for the first time, so that they look more like friends. 

After seeing Hanako apologizes to her while taking his hat off in the confession tree chapter, she thought he looked like any other normal boy and wanted to learn more about him.