So... is Love Lab finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: September 27, 2013
Manga finished: October 21, 2019
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.
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Synopsis
Love Lab centers on the student council of Fujisaki Girls Academy, particularly its seemingly perfect president, Natsuo Maki.
Riko Kurahashi stumbles upon Natsuo secretly practicing romantic gestures, revealing a hidden desire for love and a lack of experience.
This discovery leads to the creation of the "Love Lab," a project where Natsuo and Riko, and eventually the entire student council, experiment with and research various aspects of romance.
Through comedic situations and their unique interpretations of love, the girls explore friendships and the complexities of romantic relationships.
The anime follows their humorous adventures as they learn about love, all while creating strong bonds within the student council.