It starts where one of the teachers, Miss Yurari, bike chain breaks. So when a student volenteers to help out, she takes his bike and rides off to school. She ends up going to the wrong room, so when she goes to the right room, she intraduces the new kid, Chiyo. Chiyo just wants to fit in, but everyone thinks that she is perfcet. Tomo tries to challange her in a battle of smarts, but it didn't work out to well. Then Tomo tries to beat Sakaki in a 100 cm dash, she tells her that her boobs were bigger then hers, and told her to move back. But Sakaki still won. Yomi thought that Tomo was in over her head to many times. Then the new girl Osaka turns into Tomo's rival just because Tomo thought that she was a theret.
Other parts of the episode were Sakaki was walking around and saw a cat, she tried to pet it, but it bit her hand, twice. Then Chiyo over reacted to not doing the homework, she got scared and told the teacher why she didn't do it.