Tsunetsuki Matoi, student no. 22 of class 2-F who obsessively stalks her boyfriend, currently Nozomu (who rarely acknowledges her). In addition to regular stalking antics like letting herself in her target's house with a duplicate key, planting bugs in his room, calling/texting him every five minutes, and following a few steps behind him, she adopts the same fashion sense as the person she's stalking. Her name is based on tsune tsukimatoi, "always dangling after".
|Characters of 91 Days|
| Tarou Sekiutsu | Kafuka Fuura | Manami Ookusa | Kanako Oora | Meru Otonashi | Ai Kaga | Chiri Kitsu|
Kaere Kimura | Abiru Kobushi | Kiri Komori | Matoi Tsunetsuki | Miko Nezu | Nami Hitou | Harumi Fujiyoshi
Madoka Marui | Shouko Maruuchi | Mayo Mitama | Rin Itoshiki | Kotonon