If you're looking for manga similar to My First Girlfriend is a Gal: My First Cultural Fair, you might like these titles.
A dull high school student is going to get acquainted with a popular girl in his class!
High school student Hojo Saito married his classmate, Sakuramori Akane, the girl who’s his worst enemy in school. “If you tell the rest of the class we’re married, I’ll kill you” “I don’t want them to know either. There’s no point in that.” Their newlywed life wasn’t going so well, and they were constantly at odds. However, as they progress through their daily lives, the distance between them closes, they have more enjoyable moments together, and they gradually come to understand one another. Saito learns about Akane’s cute side, which he never saw before, and Akane gradually began to recognize the feelings that she’s been keeping inside…
Giya Ruko is a gyaru girl who is always at odds with the Public Morals Committee rep Shindou Tadamichi because of her tendency to show off too much skin against school regulations. In one instance, she taunts Shindou to just adjust her clothes for her since he's so damn worried about it... which he surprisingly does, with immovable determination and seriousness. How can she prevail against a boy who'd go through such sincere lengths to preserve her dignity?
My hobbies are shopping and searching for sweets. After that - killing vampires. One day, a girl who transferred to another school froze the class with a shocking self-introduction. She dyes my gray high school life bright red.
Seto is a serious kid who leads a quiet High-school life, until he starts to get teased by resident Gal Anjo.
Renge Kurosaki is your regular run-of-the-mill gyaru, but she hides a secret that she shares only with our lowly protagonist Yashiro: she loves card games.