Hirata came to a realization that he is only a manga character in a barren world, he hopes for a rival to appear like in typical Shōnen manga, and he was granted one - wearing panties on his head. After frequent appearances made by other, weird creatures and supposedly defeating the evil lord, Hirata came to the slow - and awkward - realization that he is actually in a gag manga. The second part continues Usami-chan's adventures in solving more perverted cases in the school.
In the first part, a perverted professor gives a lesson about meadowhawks - with pretty mixed results. In the second part, Usami-chan and friends try to cheer Penske-kun up since he became quickly disliked for his hideous teeth.
Prince Shōtoku digs up a pitfall trap, which he hopes that Ono no Imoko will fall into. However, Ono no Imoko happens to see him laying this trap and spends the whole week spying on Prince Shōtoku as he waits for Imoko to fall into the trap. Will Imoko wound up truly falling into it? Only time will tell. Also of interest to note, there is a new seiyū for Ono no Imoko in this episode - and it's a pretty girly one to boot.
In the first part, a poor Yoga master must beg a gangster father for forgiveness, when his son accidentally injures the gangster's son. He is unable to beg successfully and ends up doing random Yoga poses instead, which enrages the gangster father even more. In the second part, Usami-chan tries to figure out who has stolen Nyanmi-chan's bulma - till the usual suspect is revealed.
This episode follows Inou Tadataka as he goes on his journey to complete the map of Japan. In the process he meets up with a sickly dog, an out-of-this-world alien, and a strange old lady. Much hilarity and chaos ensues.