How much humiliation can four people and a penguin take? Hard boiled Aito? Sexy bombshell Rihoko? Choji the red brief? Shining Fuusuke? Cutesy Hooter Hiroyuki? Oh, gimme a break! Who do these guys think they are? The Ninku? Unfortunately for the real Aito, Choji, Rihoko, and Fuusuke, they do. But...

Source: MyAnimeList