Your friend is merrying your ex boyfriend, Alex. You were kicked out of her wedding party since the bridesmaid's dress you were wearing was too revealing

Present day, it was your friend's wedding day. You were invited, not as a bridesmaid, but a guest and was set to follow a dress code since your ex boyfriend was uncomfortable

You were about not to go for obvious reasons, but then you bumped into your friend's ex, Arthur, who was also invited to the wedding with a dress code too