I don't believe the premise as described in the title by itself is deterministic. If a yuri series with two gyaru protagonists is a slice-of-life story with little to no drama, that is still a creative choice. Even if the gyaru archetype is known for a no-nonsense attitude, that does not mean two characters of this archetype will necessarily agree on things or can resolve every conflict by being honest.
The "gyaru x gyaru" premise also belies the distinct character dynamic of the titular couple. That is, they are both gyaru, but also more than that (just like any good gyaru character). For example, Reina is noted as more shy around people outside of her immediate circle than Yua is, and yet she was the one who asked Yua out. It's implied that she already fancied Yua in their first year when they were in different classes. Their relationship sails pretty smoothly, but it remains convincing because of all these little details in the brief glimpses we see of it.
Other than that, being girls who embrace a more confrontational style of femininity and always stick to their guns is just how I would describe the general, most surface-level appeal of the gyaru character; though to straight people their appeal may be different in ways I can only guess. (For example, from the perspective of a lot of straight men, maybe the appeal is the fantasy of 'fixing' a girl who looks and acts like a 'slut'.)
The specific appeal of gyaru in yuri probably has to do with what the gyaru archetype embodies by default, and what changes about the archetype when it's used in yuri. If I have to ask myself, one part of the unique appeal of a gyaru character who likes girls might be that she uses this confrontational femininity to attract another girl, and is also courageous to be loud and proud about it. (The couple in this series illustrate this well.)
From the other girl's perspective, the gyaru can be a source of inspiration (in attitude and feminine skills) and a source of physical affection even at the earliest stage of a relationship. Hugs between female friends are considered normal, but compared to other archetypes I can more easily think of gyaru characters in yuri who don't hesitate to drop what they're doing to check in with a crying girl and offer a hug even if they're not friends yet.
last edited at Nov 5, 2025 3:46PM