So... is Gensou Mangekyou: The Memories of Phantasm finished or not?
NO, it is not finished.
Why?
We found unfinished non-core content:
Touhou Niji Sousaku Doujin Anime: Musou Kakyou (Alternative Setting)
Hifuu Katsudou Kiroku: The Sealed Esoteric History (Alternative Setting)
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
In Gensou Mangekyou: The Memories of Phantasm, the land is experiencing an unnatural winter in spring, and Marisa, a curious magician, believes a youkai is the cause.
Driven by her suspicion, Marisa embarks on a journey to uncover the truth behind the bizarre weather anomaly.
Her investigation leads her to the netherworld, where she confronts the youkai responsible for the strange occurrences.
The question remains: Will Reimu, her friend and a powerful shrine maiden, arrive in time to aid Marisa in her battle against the youkai and restore balance to the land? The fate of the land hangs in the balance.