shoujo where this girl is basically hella pretty and is the love interest for many males a...

shoujo where this girl is basically hella pretty and is the love interest for many males around her. The girls are jealous of her. she meets this popular dude, and this brother and sister pair and she makes friends. i think her nickname was riri-chan and one scene with the sister girl was buying matching mugs together and she confesses to the popular dude during a school festival I believe

anyone knows? I've been trying to remember the name for the past few years