It was about a girl who had an overprotective brother. She is starting 1st year of High School and meets a guy who lost his contacts in school and she finds one contact and he falls in love with her. However, the brother is overprotective and there's kind of a rivalry between them. I think it is around 3 chapters. Anyone have a clue?

The manga is called Guruguru Meguru. I hope that is what you're looking for 😀 😀