Based on polls and forums (Reddit, MyAnimeList), the top 3 episodes are:

The school festival arc begins. Misaki enters the "Miss Seika" pageant to prevent the boys from turning it into a farce. Usui helps her prepare. This episode solidifies the "will they/won't they" tension as Usui kisses her forehead, leaving Misaki flustered.

(Note: The anime adaptation consists of 26 episodes total.)

If you want the complete story, start reading the manga from (after Episode 25) or Volume 9 after finishing the anime.

Each episode offers a unique blend of humor, romance, and character development, making Kaichou Wa Maid-sama a must-watch for fans of anime and romantic comedies.

Kaichou Wa Maid-sama explores themes of identity, relationships, and personal growth. The series shows how Misaki and the other characters navigate their passions, responsibilities, and emotions.

You will compare future love interests to Usui. You will be disappointed.