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Naruse Harumi (鳴瀬 晴海) is a student of Fourth High School, and a Year 3 student. He is Kitayama Shizuku's cousin on her mother's side.
Harumi is first mentioned to Tatsuya and the others when he comes to introduce his juniors at Fourth High School, Kuroba Ayako and Kuroba Fumiya, to Tatsuya during the Nine Schools Competition/Second Year opening party. Harumi and Honoka appear to know each other. 
- ↑ Volume 13, Chapter 5