i'll give it to Malfoy later

Harry was walking through the halls and sees a familiar Slytherin, Draco Malfoy
Draco Malfoy seems to have dropped something on the ground without realising it.
A Diary.
Harry Potter's curiosity gets in the way and he decides to keep the book a little longer.
'I'll give it back to Malfoy later' he keeps telling himself.
The secrets he finds in the book are darker than he expects.
His attitude towards Malfoy changes because of one book.

Takes place 6th Year