So... is Tokimeki Memorial: Only Love finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: April 03, 2007
Manga finished: July 27, 2007
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
Riku Aoba, a new transfer student, finds his new high school to be anything but ordinary. From eccentric faculty to students sporting animal ears, the school is full of surprises.
He quickly gets caught up in the student council's bizarre activities and struggles to navigate the school's unique social dynamics.
Riku must balance the challenges of adapting to this strange new environment with the usual pressures of high school life, like popularity and romance.
The story focuses on Riku's experiences as he tries to survive and thrive in this unconventional school setting.