Present

The words that Alexander had said a few days ago echoed in Sebastian's mind. "You can forget everything else except your present to her, Sebby. I'm telling you… you're doomed if you actually fail to give it to her. So, make sure not to forget about it." 

Sebastian had simply responded with a deadpan 'yes'. Because he believed that there was no way he would actually forget it. It is like, come on… her birthday. So why would he forget her birthday present?! Yet here he was, almost actually failing to even remember. 

Somehow, Alexander's annoying I-told-you-so-face telling him the words 'See? That's why I told you to always listen to this wise old man of yours' flashed in his mind. He could not believe that Alexander seemed to have even seen this one coming as well! What is he? A prophet now?!