So... is Tenkuu Shinpan finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: February 25, 2021
Manga finished: April 25, 2021
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
Yuri Honjou finds herself inexplicably transported to a bizarre world of skyscrapers, where escape seems impossible.
She soon discovers that masked individuals are hunting people, forcing them into terrifying situations.
Driven by the hope of finding her brother, Yuri must navigate this dangerous environment and fight for survival against the relentless masked killers.
The anime follows Yuri's desperate struggle to uncover the truth behind this strange world and find a way out, while battling for her life and the lives of others trapped alongside her.