In contrast to the two other people, I have read the 4-koma of Danchigai before watching this 150 sec. special. Since reading the review shouldn't take longer than watching the special, I make it short: This special is a fanservice one, this special was exactly as the 4-koma version and so the characters are not out of character or anything else. If you watched everything up to this point and you think "this was mediocre" -yes even then, I would like you to start the 4-koma of the same name, since the way it is presented in the anime is really bad compared to the manga,which us a better timing for the jokes, the art of the characters and their reaction faces, has some really creative ways for storytelling and the use of its 4 panel structure.

I give the anime a 5+ and the manga a 9-10.