You receive an invitation in the mail...
(dress code is formal and darker colors!)
It was almost as if Watanuki knew what this was before he opened it; carefully trailing his fingers on the envelope as he smiled quietly to himself. His heart all but swelled when he finally slipped the invitation out, carefully reading over the script, and admiring just how lovely it was.
He did not know Sebastian at all, but to know Vanth was truly happy to want to spend the rest of his life with him.. well, it only made the shopkeeper even more abundantly happy for his friend.
Luckily, he already had their gift planned out!
"I look forward to attending. I'm rather proud of Vanth-san for being so formal about everything.." he chuckled to himself, quietly slipping the invitation into the front of his robes.
"Ah-- I wonder if he meant for Shadow-kun and Hanabi-san to be invited, as well? I'll send him a text.."