Is the manga in Episode 3 of "The Everyday Tales of a Cat God" based off a real manga?

Question

In episode 3 there is a manga about a girl who moves to Tokyo after a string of bad luck only to find that her roommate is a death god who seems to just mooch off her. I am wondering if this is based off of another manga.

You can find more examples in the link in the comments. I think that's a large enough sample to determine if the manga used in the anime is based off any other manga.

Answer 1

кяαzєя's comment is right on the spot: Yes, it's from 大凶ちゃんとしあわせな世界 (Daikyo-chan to Shiawase na Sekai, Misfortune Girl and the Lucky World), a 2-chapter special spiritual one-shot by FLIPFLOPs on Champion RED magazine edition 2007-12 ~ 2008-01. It's also included in the 1st volume of The Everyday Tales of Cat God manga (Source: MyAnimeList).

^{Image source}

The story, as it has been mentioned in the question, is about

Kyouko, a test-taker who came to Tokyo and is living alone.
Shinigami Karin, Kyouko's roommate.
The story about their certain Sunday life.

^{Source (Japanese)}

---

Here, we can see Shamo reading the RED magazine,

^{Image source}

And here is the scanned page of the last picture in the question,

^{Image source}