Another option could be 'Ao Haru Ride'. It portrays the experiences of high school students, dealing with emotions and personal growth. The story has depth and the characters are relatable.
One manga that could be similar is 'Ouran High School Host Club'. It has a light-hearted and fun school setting with interesting characters.
The girls in Highschool DxD manga are usually depicted as strong-willed and charming. They have unique personalities and powers that make them stand out.
The girls in Highschool DxD manga are known for their diverse traits. Some are confident and independent, while some are vulnerable and in need of protection. Their personalities and powers make them stand out and contribute to the exciting storylines.
I'd recommend Rosario + Vampire. It has a similar supernatural theme and school setting as Highschool DxD.
You might find 'Blue Period' similar. It also explores the experiences and growth of characters in a high school setting, with similar themes of self-discovery and friendships.
Maybe 'Parasyte' is somewhat like it. Both have a survival theme and showcase characters' struggles in a world full of threats. Also, the art styles have a certain resemblance.
It usually shows mundane daily routines, school stress, and typical teenage girl problems.
One popular one is 'Kuroko's Basketball'. It has girls in high school competing fiercely on the basketball court.
It's a genre that often features themes of restraint and control involving the female characters from High School DxD. But such content can be controversial and not suitable for all audiences.
It usually has explicit and adult-oriented content focused on the highschool girl theme.
The girls-only aspect might focus more on their friendships and internal dynamics. It could offer a unique perspective on the story.