A complete and total waste of your time.
The first Volume is surprisingly solid, building tension and exploring the mystery of the Wraith threat, while also shedding more light on Sayaka's death in the new universe. Then, Volume 2 starts to bring in the craziness, introducing a Wraith that looks like Madoka to Homura alone, and causing Homura to start questioning if her memories of Madoka's existence were even real or not. All for the third and final volume to be an incoherent piece of shit that contradicts itself, overexplains literally everything to the point that my brain was melting from trying to understand what was going on, and in the end, it all leads to a time reset? What I gathered from this is that Homura was unsure why she lost her time magic, and instead gained the ability to manipulate memories. This plants the inner seed of doubt that her memories of Madoka were all fabricated for some reason. The presence of Wraith Madoka drives that further when she's forced to confront someone who looks just like Madoka, but nobody can see that. All leading to Homura realizing she forgot what her wish to become a Magical Girl was and ultimately making her believe Madoka was just a farce she came up with. BUT it turns out that the shield that allowed her to manipulate time had somehow became home to a pocket dimension where a witch existed? Also, Homura's magic was stolen and it was given to this Wraith Madoka, but eventually she dies and it instead takes physical form and explains that Homura did in fact; alter her memories, and that her ability to manipulate memories was the result of a miracle when Goddess Madoka reset the universe with her wish to prevent the existence of Witches?
As you can tell, it's a mess of writing and planning. What cool ideas are there are dragged down by incompetent, incoherent writing that does nothing to bridge the gap between the Anime and Rebellion Movie. Skip this, you don't need the context of it. The character interactions are nice, i will give it that. But otherwise; avoid it.