This is harder then I thought, it's hard to think if a specific milk shake...
Dark Pit: How bout chocolate?
Again?
Dark Pit: Well, excuse me-
Don't start.

"Hello (y/n)" Corrin greeted you back "you look very cute in your maid outfit" he complimented. You blushed and said a small "thank you" before guiding him to a table.
"What would you like today master?" You asked "a milk shake please, the cafés specialty" he replied. You nodded and went to prepare it.
"Remember to put the chocolate syrup" Ruru instructed you "alright" you said squirting the chocolate at the bottom.
After a while the milk shake was done.
You served it to Corrin who happily accepted and took it from you.
Your fingers brushed against his lightly. Nevertheless it was still enough to make you blush.
He happily enjoyed his milk shake while you stayed at the bar counter chatting with Ruru "I'm surprised, he has only been here for a few days and he's already accumulated a lot of money" she said as she washed a plate.
"Well yeah, Corrin won most of his battles so of course he would gather this much money"
Ruru wiped the plate before putting it away "look he's almost done" she pointed at Corrin's direction who was finishing the last of his milkshake.
When he was done you came over to him "how was it?" You asked. He smiled "it was delicious thank you" he replied.
Once you kept the dish Corrin paid and was at the door.
"I hope to see you again master" you said bowing. "I hope to see you again as well fair lady" Corrin replied making you blush harder.
Ruru smiled at the back unnoticed "man, what Corrin would give to have (y/n)" she muttered.

Hmmm not my best but I'll keep trying.