So... is Hiatari Ryoukou! finished or not?
NO, it is not finished.
Why?
The anime finished after the manga:
Anime finished: October 01, 1988
Manga finished: January 01, 1981
... But 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:
Hiatari Ryoukou!
Sunny Ryoko
Anime - Base
Release date: March 29, 1987
Hiatari Ryoukou! Yume no Naka ni Kimi ga Ita
Sunny Ryoko! You Were There in a Dream
Anime - Sequel
Release date: October 01, 1988
Synopsis
Hiatari Ryoukou! centers around Kasumi, a 15-year-old girl who moves into her aunt's house to attend high school.
She anticipates a peaceful living situation, but is shocked to find she'll be sharing the house with four male students.
Things quickly become complicated when a potentially embarrassing incident occurs with one of the boys on her very first day, setting the stage for a chaotic and eventful high school life.
The anime likely explores the dynamics between Kasumi and the boys, focusing on the challenges and humorous situations that arise from their unconventional living arrangement.