Mikami Komata

Also known as Classmate Shock and Komata Mikami

https://twitter.com/mikamikomata
http://mikamikomata.blog136.fc2.com/

K-ON! Anthology Comic ch01: To-Sen! released Apr 26 '10 4-koma Anime Comedy Music School life Spin-off
Hidamari Sketch Anthology Comic ch03: Yuno-Sama of the Future Hidamari Sketch Doujin released Nov 17 '13 4-koma Comedy