Gintama - Season 3 Episode 49 Zip Up Your Fly Nice and Slowly

The episode begins with a short sequence about Kamui transferring into Yato High School and is told from Abuto's point of view. While the Shinsengumi are out on a mission, Hijikata notices snot coming out of Kondo's nose so he wonders how he could tell him without the others noticing Kondos problem. In the end the snot even takes control over Kondo's body and it comes out that Kondo's true identity is being an Amanto in snot form. As Hijikata destroys it, he realizes it has been all a dream.