Gintama: Season 4, Episode 2

4 - 2: The Heavens Created Chonmage Above Man Instead of Another Man

The Shogun wants Gintoki, Kagura and Shinpachi to redo his mage. After Kagura is trying to ask the Shogun how he wants his hair done, she vomits and a Naruto gets stuck on the Shogun's head. Then the three Yorozuya try removing it with a razor and accidentally cut off the Shogun's mage. To cover up their mistake they try to find a replace for it.