"Chururira Chururira Daddadda!" is an original song by Kurage-P. It's widely considered Yukari's most notable song.
The true meaning of this song's lyrics are vague and abstract, but it seems to be about a student who is trying to get rid of her schoolmates by telling on them. At the beginning, there are roughly 40 students in the classroom, and the character portrayed by Yukari carefully watches each individual to catch them doing anything bad. She declares that she will eliminate every student one by one, until the sole remaining survivor is determined. Finally there are zero students left as if a massacre occurred, and the character decides to do away with the teacher.
This song has entered the Hall of Legend. It is featured on Kurage-P's album TOP SECRET!!.