So... is Isuca finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: August 26, 2015
Manga finished: April 04, 2017
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.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Isuca
ISUCA [イスカ]
Anime - Base
Release date: January 24, 2015
Isuca: Gokuraku
ISUCA 第拾壱話「極楽」
Anime - Sequel
Release date: August 26, 2015
Synopsis
Shinichirou Asano, a down-on-his-luck high school student, finds himself in a precarious situation after his parents leave him with little money.
Desperate for a job to pay rent, he encounters a supernatural world he never knew existed.
After being saved by Sakuya Shimazu, a student from his school and an exorcist, he learns about her family's duty to protect humanity from dangerous spirits and monsters.
Circumstances lead Shinichirou to become involved with the Shimazu family and their exorcist activities.
He ends up working for them as a housekeeper, a job that helps him survive but also pulls him deeper into their world of supernatural threats.