So... is Sugar*Soldier finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: January 28, 2014
Manga finished: June 03, 2015
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:
Synopsis
Sugar*Soldier follows Makoto as she enters high school, eager to establish her own identity and distance herself from the fame of her successful model sister.
She's determined to make a fresh start and define herself on her own terms.
However, her plans are complicated when her sister's presence unexpectedly enters her new school life, potentially disrupting Makoto's carefully constructed image.
The anime explores themes of identity, individuality, and the challenges of living in the shadow of a well-known family member.