So... is Kyou no 5 no 2 finished or not?
YES, it is finished.
Why?
The anime finished after the manga:
Anime finished: March 21, 2007
Manga finished: June 20, 2003
MangaUpdates contains information about the anime adaptation and indicates that it is complete.
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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Synopsis
Kyou no Go no Ni focuses on the everyday life of Ryota, a spirited and energetic fifth-grade boy.
The story follows his experiences in elementary school, particularly his interactions with his female classmates.
While he's a typical kid, Ryota often finds himself in unintentionally awkward situations, adding a comedic element to his daily school life.
The anime appears to be a slice-of-life series centered on the challenges and lighthearted moments of childhood.
It seems to explore the dynamic between boys and girls in a classroom setting, with Ryota acting as a central figure in these interactions.