I came across Karasu accidentally and decided to check it out, after reading the description on it and finding out the writer of Shoiri Experience had worked on this I was really interested in it despite the low number of volumes and chapters available, I thought I'd found some kind of hidden gem. But after the small time it took to read through it I can fully say it's not. Story wise it's fine, it had insane potential and I have no clue what really happened in the background, but as it is there's literally nothing there. Art is subjective but the art here has some reallyuncanny look to it that doesn't help at all, and I actively think this has up there some of the unintentionally worst art I've ever seen in a manga.

There's a fair amount of the odd ecchi scattered around with leagues of characters who're introduced, never get developed then disappear. Nothing feels explained like the crucial "why should i care" that you'd think would be there.

Read it if you want, it wasn't offensively bad or disgusting and I'm sure the ecchi will turn someone on. but for me the literal only slightly redeeming quality is the potential it could've had.