In the last episode of Hanamonogatari, near the end of the episode where Araragi prepares to cut Kanbaru's hair, he said "You are the third girl whose hair I'm cutting".
Who was the other two girls that got their hair cut by Araragi?
In the last episode of Hanamonogatari, near the end of the episode where Araragi prepares to cut Kanbaru's hair, he said "You are the third girl whose hair I'm cutting".
Who was the other two girls that got their hair cut by Araragi?
One of the two girls is Hanekawa Tsubasa. Remember that during the events in Karen Bee1, she underwent an image change where her usual braided hair was replaced by bob cut, and her glasses replaced by contact lens. Her hair was actually cut by Araragi when she went out with him to karaoke in the short story Tsubasa Song2, which takes place some time after Tsubasa Cat and before Karen Bee.
I don't know who the other girl is. There are many characters whose hairstyle has changed between the First Season and the Second Season of the light novel series, but they are not cut by Araragi:
1 Light novel - Nisemonogatari Volume 1 - Karen Bee Chapter 011. Anime - Nisemonogatari Episode 4
2 Published in Bakemonogatari Anime Complete Guidebook. According to Wikipedia.
3 Light novel - Nisemonogatari Volume 2 - Tsukihi Phoenix Chapter 005.
4 Light novel - Nekomongatari (White) - Tsubasa Tiger Chapter 066. Anime - Monogatari Series: Second Season Episode 5.
5 Light novel - Nisemonogatari Volume 2 - Tsukihi Phoenix Chapter 005. Anime - Nisemonogatari Episode 9.
Turns out the 2nd girl is Tsukihi; "Tsukihi Brushing" is set some point after Araragi graduates.
A brief summary of the story: Tsukihi steps on her long hair, wants to cut it, Araragi wants to do it, dumb shenanigans ensue, Shinobu gets fed up.
A translation can be found here.