A happy-go-lucky girl named Silva wielding a scythe and claiming to be part of an evil organization transfers into a normal high school. She befriends her classmates, skirmishes with the heroes of justice, and helps to recruit new members into her organization. It's a comedy full of good and evil (which is which is sometimes difficult to tell), dubious magical girls, hopeless adults, and pudding.

Other authors' interpretations of Kakifly's original K-ON! 4koma strip.
"This is a K-ON! special. It consists of single-page 4-koma stories about K-ON! characters drawn by different mangaka."
(Source: MU)