Similar to Imperio, but maybe it stuck out more because I read this right after Imperio.
In this one, girls keep trying to trap Harry with a love spell. When Draco finds out that Harry has been hit with a new one, with the caveat that Harry will fall in love with the next person he kisses, Draco resolves to be the one that Harry kisses. He tells himself it's to humiliate Harry, but we all know better, right?
So then we have Draco thinking Harry's only spelled to love him, Harry doesn't know WHAT the heck is going on, and in the end, it's even more than both thought it was.
This story was super cute, well written, and even had some good steam going for it.