The anime centers around the titular Ekoda, who works various jobs, and explores the city nightlife. While she has a boyfriend, she is more into casual relationships than taking it seriously. She considers popular girls (which she labels "birds of prey") her natural enemy. 

(Source: Anime News Network) 

Note: Each episode features a different director, character designer, voice actors, and studio. Each episode is also split into different segments, with the first 3 and a half minutes of the animated show, followed by live-action interviews with the creators, and then showing the drawing of the short.

Rinshi!! Ekoda-chan is a fun and dark 4-koma manga about the real (?) life of the author, a single woman in Tokyo who drifts through relationships and works at various hostess clubs and the like. Lots of commentary on "birds of prey" (moukin), girls who use their cuteness and affect stupidity in order to try to score men (against whom the author is constantly fighting).
 
(Source: Zigguratbuilder)

Based on a four-panel manga, Rinshi!! Ekoda-chan is about a single woman in Tokyo who drifts through relationships and who works at various hostess clubs and the like. 
(Source: MangaUpdated, edited)

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