For this, you may change the title, it wasn't very good. There's a spoiler for the end of season 3 of Teen Wolf.

Possible cast; Shelley Hennig

Possible love interest; Isaac Lahey

Malia Tate broke up with Stiles. One reason was she found out she didn't really want a relationship. She needed to focus on herself for now. 

Isaac Lahey, he's been in London for god knows how long. Allison's death hit him hard. Now, he's thinking of coming back. For his friends. 

The two unexpectedly meet one day and become very attracted to each other. It started out as a one night stand and now it's turning into something more. Something neither of them wanted. Love. 

I put this together real quick. For the next few hours, expect some updates:) This is open for someone to take.