Chapter 14 - "Felix Felicis" - In which Hermione and Ron discuss the Slug Club in Herbology and Harry notices an attraction between them, Dean takes Katie's place on the Quidditch team, and Harry and Ron run into Ginny and Dean kissing. Ron gets upset and Ginny tells him off, but Harry starts thinking of kissing Ginny himself. Ron becomes angry and plays terribly next practice, but for the match Harry pretends to slip him Felix Felicis, giving him confidence, and Gryffindor wins. After the game, Ron is spotted kissing Lavender, leaving Hermione upset.

In Herbology class, Harry tells Ron and Hermione about his second lesson with [Dumbledore], and Hermione describes the previous night's Slug Club party. When Ron gets upset, she admits she was planning to invite him to Slughorn's Christmas party, and Harry notices a change in his friends' behavior.

With no sign of Katie Bell returning from [St. Mungo's], Harry invites [Dean] to join the [Gryffindor Quidditch team] in her place.

At [Quidditch] practice, Ron panics and makes a fool of himself and Ginny, along with the rest of the team, gets upset with him for his play.