"Wrong Person"

Don't you know?

"Pleaseeeeee, brother!!!! Just give it to him!!! It'll be quick, pleaseee.~~"

"I already told you, Lumine. I'm not going anywhere near him."

It's hard to convince her brother, Lumine is very aware of that.

Beside the table full of sweet treats and drinks, Lumine tries to push her letter for her brother to deliver. Yet her brother repeatedly refuses, its reason not known by Lumine.

"Oh come on, Aether! Is it soooo hard to let your sister give the one she loves a letter? Why are so persistent to refuse?!"

"Why don't you just give it to him yourself?"

The brother, now known as Aether, asks, as the reason was not simply because he didn't like the male, or rather, males.

"Because a lady should not be pushy nor too easy. It is the proper etiquette of royalty!"

Lumine and Aether. Twins of the Beyrl Family, the kingdom of Beyrl. Currently representing their family for the ball of Teyvat, where families of royalty gather to meet the kingdom who rules Teyvat, the Sumerian Clan.

But a little secret that only Lumine doesn't know, is that Aether is a working as a spy, under his father-the king. His work is the gather information about each kingdom and the family.

The Monstadt City, Liyue Qixing, Inazuman Region and Fondamite Empire. Almost every one of the researching he had done was easy, key word being almost.

The Sumerian Clan was the only failed assignment given to him, albeit he even traveled to the place yet to no avail, he didn't find anything, not a single bit. But he found out one thing, that the princes of Sumeru was the one who found him out.

And it all started a few months before the occasion....