"Happy birthday Harry," said Ron.
That Christmas, Harry and Ron and Hermione thought Draco Malfoy was the heir of Slytherin. The trio met Moaning Myrtle, the ghost of the girls' bathroom and the trio made polyjuice potion illegally. Harry, Goyle. Ron, Crabbe, and Hermione's went very wrong.
Later, Hermione got petrified and it was up to Ron and Harry to save Ginny.
Then, Lockhart got himself obliviated, had to go to St Mungo's and Harry and Ginny fell in love with each other.
A few days later, Harry came over to Ginny to ask if she wanted to play exploding snap. Ginny felt the love for him from that day on...