So... is Taishou Mebiusline: Chicchai-san finished or not?
NO, it is not finished.
Why?
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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Taishou Mebiusline: Chicchai-san
大正メビウスライン ちっちゃいさん
Anime - Base
Release date: October 06, 2017
Taishou Mebiusline: Chicchai-san - You and I
大正メビウスライン ちっちゃいさん
Anime - Sequel
Release date: February 28, 2018
Synopsis
Kyoichiro, a young man from a privileged background, leaves his hometown to study in Tokyo, harboring the ability to see ghosts and carrying his family's katana.
Hoping the spirits he sees would be less frightening, he awakens to find himself transformed into a smaller, cuter version of himself.
His life is further complicated when he becomes entangled in a supernatural conflict involving factions within the Imperial Japanese Army seeking to create undead soldiers, an enigmatic stranger, and an anti-government group known as the Five Katana, threatening to derail his academic aspirations.