Ever since he met Rika when they were children, he became great friends with her. Until that incident that Rika had, Naoto wants to spend some more time with Rika and wanted to have a nice relationship with her, until Asmo came along and started trying to kidnap her.
Naoto has been his friend since childhood when he met Rika. He desires to continue spending time with her and build a positive relationship with her, but this intention was disrupted by Asmo's attempt to kidnap her.