This visual novel from the "Dragon Knight 07" is a collection of short stories revolving around a couple school students. Each story is quite different and most of the time they're not really connected with each other, but obviously you'll need to have an understanding of those before you even can start the next story. Me, personally, I liked most of them but I can understand why this might not be everyone's cup of tea. There are a few stories that basically just tell that there's nothing you can do so there's not much of a reason for the story to exist (Well, there's only one story like that and I still liked it).

If you enjoy Ryukishi's writing style and how he deals with horror, yeah, you can read this as well. And you'll probably get an enjoyment out of it in some way or another just like I did. Don't expect a "When They Cry" kinda deal out of this game though. It's definitely not going to be a good time if you do.

From his love for horror, to his interests in the supernatural, and even his past experiences as a civil servant, Higanbana encapsulates all of Ryukishi's assets.

Of course, as a collection of short stories, episodes are a mixed bag, and the resolution for each one always comes abruptly, especially the final one.

Having said that, I think this is the best way for one person to start delving into 07th Expansion's works. If, by chance, this novel piques their interest, then they can consider approaching Higurashi and Umineko.

Originally made as an attempt for Ryukishi to train himself to work on a short story format.
Due to that, experimental is the word to describe it best, which is truly refreshing after getting used to Ryukishi's ways of building a story with the long long Higurashi and Umineko.

I would have trouble recommending it to anyone who's not super invested in Ryukishi's worldviews and more specifically the constant game of "catch ball"
going on between his previous writings and his next, ever-changing and clashing against each other as they come around with new perspectives to the same issues, specifically within the WTC series.
As a result Higanbana can feel like somewhat of an edgy messy string of stories in standalone when you're not caring much about the other works surrounding it and how they connect thematically to each-other.

While not part of WTC directly, what is said relating to WTC works is where Higanbana was at its most interesting to me, it is much more cruel and dark in its depiction of suffering and their overall resolutions.

The Princess's Lie and Hameln’s Castanets being primary examples for Umineko and Higurashi respectively.

Higanbana is cruel because as its name implies, it is a story of the deads, she nourrishes herself with our repeated failures, there is no warmth to be had for what has failed and will continue to fail,
she will simply always have the last laugh as the cycle continues.