So... is Oneechan ga Kita finished or not?
It is a bit ambiguous in this case.
Why?
The anime finished before the manga:
Anime finished: March 27, 2014
Manga finished: June 27, 2020
We could not confirm the source content in MangaUpdates.
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.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Oneechan ga Kita
お姉ちゃんが来た
Anime - Base
Release date: January 09, 2014
Oneechan ga Kita: Hajimete no… Kitaa!
お姉ちゃんが来た 初めての... キター!
Anime - Sequel
Release date: March 22, 2014
Synopsis
Oneechan ga Kita follows Tomoya, a young teenager whose life is turned upside down when his father remarries.
He suddenly finds himself with an older stepsister, Ichika, who is quite eccentric and expresses her affection for him in a rather intense way.
Tomoya must navigate this new family dynamic, which includes Ichika's unique friends: the sadistic Ruri, and the well-endowed Marina.
The anime explores Tomoya's experiences adjusting to having an overbearing stepsister and dealing with the unusual situations that arise as a result.