Naoki can't move forward from the death of his older sister, Saki. He is quite resentful for different reasons, including being pitied by and gossiped about by everyone in town. He mentions that no matter what he does at school, no one has the heart to give him any consequences, so he doesn't know whether his actions are wrong or right. He hated Yosuke (possibly because he encouraged Saki to work for Junes) and therefore the Protagonist for being friends with Yosuke. Naoki meets Yu during the school camping trip and is asked for some antacids for Yosuke. He is childhood friends with Kanji Tatsumi yet they don't talk often and are in different homeroom classes.