Original creator : Ishiki
Plot summary : The four-panel manga follows a tsundere (initially aloof and abrasive, but later kind-hearted) girl named Tsumiki, the most unsociable eyeglasses-wearing boy named Io, and their classmates.
Note : Ishiki began the manga in 2006 in Hobunsha's Manga Time Kirara, and the fourth volume shipped this past July.