Sirius Black was part of the marauders, the prince of Gryffindor and a womanizer. He was the one girls pined for and he was surrounded by girls... but you precisely caught his attention when James was after Lily, and he saw you with Severus Snape... and that made him make a plan: to fall in love with you and use you against Snivellus... but, he didn't think that he would like you.

"Hey, hot stuff" He greeted you and sat next to you "you should get in the shade, you might melt, sweetie."