Getsuyobi no Soratobu Orange.

is a japanese 4-koma manga series written by Afro. It began serialisation in the special edition vol.1 of Manga Time Kirara Miracle before the March 2012 issue.

The series was released under 2 volumes from September 2012 to July 2013.

Synopsis
Watermelons, orange-like alien teachers, and a dog named after fermented beans: these are the characters that show up in this lively and quirky world of Monday Flying Orange. Yoshino, the hyper one, will run till the end of the Earth. Tsuka-pon is the orange(?) professor. Natou is the dog. "Senpai" will usually be found sleeping or lost. Manaka loves animals and sports thick eyebrows. And last but not least: Nanami, a.k.a. Na-chan, will be found riding her bike to school. A cute and quirky world awaits for this lively cast!

(Source: DrCoke at MangaHelpers)