Tsukihi Phoenix - Part 1
S02E08 - Airdate: 2012-02-26
Runtime: 25 min
Karen is acting clingy and very cute, completely out of character. But it's a trick to get Koyomi to introduce her to Kanbaru. Fearful of what Kanbaru sexual proclivities, he devises a test Karen must pass; a test involving her toothbrush.
Episode details and rating from TVmaze.