Sayonara Zetsubou Sensei 2x2

The first part of this episode is supposed to follow this storyline from a chapter of the Zetsubō Sensei manga. Perry has come to the school on the anniversary of the school's founding. He is an American Commodore who known for opening up Japanese ports to foreign trade (in Japanese, the phrase "opening the school" (開校?) is pronounced the same as "opening the ports" (開港?)). After he opens up various things in the school, he tries to open up Nozomu Itoshiki's mind. Suddenly, Nozomu releases a mysterious wave that reveals the dark side of the world, which is full of despair. Finally, Perry learns the lesson that he shouldn't try to open up everything in the world. However, all the characters speak unintelligible gibberish, and the subtitles suggest that Perry is Son Goku looking for the Dragon Balls and that Nozomu is an alien bent on stopping him. In the next part of the episode, Nozomu is complaining about the over-decoration of various things in Japanese society. However, Kafuka Fūra denies it, saying that it is just a trend among stylish elites. In the next part, Nozomu meets his old time friend Ikkyū-san, who likes old things. They discuss together how old things are often ignored in modern Japan. Ultimately, he wants to obtain a former-surname by marrying Nozomu's sister Rin. Rin tries to escape from Ikkyū by calling her butler, but he ends up persuading Ikkyū-san to marry her. However, Kafuka manages to find out at the end that Nozomu and Ikkyū are not old friends, but rather one-day friends during the first day of school.