As a general rule, Kanda is a master of the art of tsukkomi. Helps that he has lots of bokes to practice on.
Episode 2: Mashiro asking Sorata to take her clothes off. It's amazing just how far they go, considering Mashiro wasn't actually teasing Sorata (though she did try, when Sorata called her out on not making the whole thing the least bit sexy).
Misaki accidentally takes off Sorata's boxers. *beat* "Pervert."
Episode 7: A breather episode introducing the very energetic younger sister of Sorata. She has very interesting imagine spots too.
Episode 8: When it's revealed that Nanami had gone commando. The others just wouldn't stop teasing her about it.
The Anglo-Japan Shiritori of Things You've Always Wanted to Say, courtesy of Kamiigusa Misaki.