So... is Imouto sae Ireba Ii. finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: December 24, 2017
Manga finished: February 18, 2020
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
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Synopsis
Imouto sae Ireba Ii. follows Itsuki Hashima, a light novel author with an, shall we say, *intense* fascination with little sisters as a literary trope.
The story revolves around Itsuki and his close-knit group of friends, all of whom are involved in creative fields. We see their daily lives filled with quirky antics, playful banter, and mutual support.
While the group dynamic is generally lighthearted, each character grapples with their own personal challenges and ambitions, dealing with the pressures of their careers and unresolved emotional baggage.
Ultimately, the anime explores themes of friendship, creativity, personal growth, and the search for meaning in a world that can be both absurd and deeply affecting.