Kakinuma is shown to be somewhat awkward and nerdy, never really standing out much.
Kakinuma has a bowl hairstyle and wears rectangular framed glasses.
- Volume 8: Chapters 67, 68, 69
- Volume 9: Chapters 82, 88
- Volume 10: Chapter 95
- Volume 11: Chapters 99, 105,
- Volume 14: Chapter Special Edition
Strikethrough episodes or chapters indicate the character was mentioned but did not make a physical appearance)
Kakinuma is usually shown to be with a couple of other nerds playing video games. None of the others have been named, and not much is known about them or their relationship.
- While there is a Tomoya Kakinuma playing catcher for the Chiba Lotte Marines, he started playing 2017.
|Female Characters||Tomoko Kuroki | Shiki Futaki | Anna Haruna | Shizuku Hirasawa | Akari Iguchi | Hikari Itō | Megumi Imae | Asuka Katō | Kayo | Kotomi Komiyama | Mrs. Kuroki | Koharu Minami | Miyazaki | Nagi | Miho Narita | Yū Naruse | Hina Nemoto | Ogino | Akane Okada | Reina | Fūka Sasaki | Kiko Satozaki | Sayaka | Yuri Tamura | Mako Tanaka | Emiri Uchi | Masaki Yoshida|
|Male Characters||Tomoki Kuroki | Aomatsu | Art Teacher | Hatsushiba | Homeroom Teacher | Jun Ishimine | Kakinuma | Yoshinori Kiyota | Kosaka | Mr. Kuroki | Suzuki | Nico Tanigawa | Wada | Yocchan|
|Minor and Unnamed||Minor and Unnamed Recurring Characters|
|Manga Volumes||1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18|
|Anime Episodes||1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | OVA|