Miss in Kiss

Similarities:
- main male lead is arrogant genius
- main female lead is in love and "stalk" the main lead
- main female lead doesn't have good grades at school, but is friendly and cheerful
- happy ending
- school theme

The original Taiwanese version filmed a decade ago with Joe Cheng and Ariel Lin as the leads

In both shows the leads are socially awkward outcasts. They also idolize their popular love interest.