A possible concise summary is:
Emma, a shy and gifted girl, has a crush on her neighbor Wyatt, who is popular and handsome. She tries to win him over by becoming friends with Gianna, the queen bee of the school, who is secretly a lesbian. Emma accidentally kisses Gianna during a blackout and starts dating her in secret, hoping to make Wyatt jealous. However, she realizes that she actually likes Gianna and stands up to Wyatt when he exposes their relationship. Wyatt gets expelled for releasing snakes in school and Emma and Gianna are accepted by their peers.
Here are some key facts extracted from the text:
1. Emma is a shy and gifted girl who has trouble making friends and suffers from bullying at school.
2. Wyatt is Emma's neighbor and friend who she has a crush on, but he ignores her and uses her for math homework.
3. Gianna is the most popular girl at school who everyone adores and fears, and who initially mocks Emma for being muddy and nerdy.
4. Emma accidentally kisses Gianna during a blackout at a party, and discovers that Gianna is a lesbian who likes her.
5. Emma agrees to date Gianna secretly, hoping to become popular and win over Wyatt, but she develops genuine feelings for Gianna over time.
6. Wyatt tries to get back with Emma after she becomes more attractive and confident, but Emma rejects him and exposes his prank of releasing snakes at school.
7. Emma apologizes to Gianna for using her, and Gianna accepts her flowers and decides to come out publicly as a lesbian.