Karen is acting clingy and very cute, completely out of character. But its a trick to get Koyomi to introduce her to Kanbaru. In response, he devises a test Karen must pass; a test involving her toothbrush.
| Creator | N/A |
|---|---|
| Actor | Hiroshi Kamiya, Chiwa Saito, Yui Horie |
| Country | Japan |
| Production | SHAFT |