Young Ace
The original manga by Kitsune Tennouji began serialization in Kadokawa Shoten's "Young Ace" magazine from July 4, 2009, before moving over to "Shōnen Ace" from June 2011. A 4-Koma sideseries entitled "Upotte Nano" ran in "4-Koma Nano Ace" from 2011 to 2013, when the magazine folded.