The romance manga guy could have trained hard for this moment. He might use his physical strength and fighting skills to directly confront the monsters. Or, he might have a magical item that gives him the ability to shield the girl from harm.
The guy might use his special powers or weapons to fight off the monsters and keep the girl safe.
She might use her fighting skills or her influence to keep him safe.
She might use her fighting skills or her influence to keep him safe from various threats.
She might use her fighting skills or her influence to keep him safe from any threats.
Maybe she uses her fighting skills and fierce attitude to scare off anyone who threatens him.
The delinquent girl might protect the guy by being constantly by his side, ready to defend him at a moment's notice. Maybe she also has connections that help keep him safe.
The guy's mother in manga can protect the girl by being a good role model, guiding her through tough times, or even physically defending her when needed. It really depends on the specific story and its plot.
The guy's mother might protect the manga girl by being vigilant and always keeping an eye on her.
It could be a story where the manly guy has to protect the world from the girl monsters or maybe he forms an unlikely alliance with them.
You can give the girl some special powers or skills to defend herself.
It's possible. But the manga might be more about their careers and the challenges they face rather than a straightforward romance. You'll have to keep reading to find out for sure.