hermione granger has found out, under the new law, that she has to get married.
harry offers to marry her, just so she doesn't end up with someone horrible.
but, perhaps, they'll fall in love in the process.
Left by his fiancée a month before the ceremony, Draco never got his dream wedding, so agreeing to assist Granger with her own wedding planning to distract himself from his broken engagement seems like a great idea-though Draco probably shouldn't fall in love with the bride-to-be. Based very (very) loosely on The Wedding Singer.