Flat & Flow

is a japanese 4-koma manga series written by Kaneko Masaru. It began serialisation in the July 2007 issue of Manga Time Kirara Carat.

The series was released under 3 volumes from June 2008 to June 2010.

Synopsis
Meet Natsu and Hana, the two young women who are the managers of a beat-up apartment building, as they try to find tenants, upkeep the place, and generally have a good time.

(Source: MU)