I recommend Heart Sealing Love! Go Back to 2000 and Be a Top Student. The female protagonist was originally a top student. She was trapped by a male protagonist for ten years and was reborn back to the third year of junior high school. She wanted to try to make up for all her regrets and become the ideal top student. The male protagonist was younger than the female protagonist. After falling in love with the female protagonist, he skipped grades and entered the same university as the female protagonist. I hope you like my recommendation.