Not Really My Cup of Tea

I was up late writing tomorrow's training plan.
It was then that I heard a knock, followed by a familiar voice from beyond the door.
Captain?
Are you still up?
Annah? Come in.
Annah stood at the door in her usual uniform.
She was smiling brightly with a huge paper bag in her arms.
You really are still up!
I was just revising the training schedule.
Whoa, that sounds exhausting!
You already went all out during training today!
You mean training and your party members come before yourself...?
Yup, just as I thought. You're so, so responsible.
Why are you up at this hour, Annah?
Oh, I had to dash off for a town guard emergency dispatch. An on-site incident response.
Even if I'm technically on leave, the job is still the job, you know?
But on the way back, I noticed only this room still had the lights on.
So I figured someone might need an emergency support package, and wouldn't you know it!
Annah grinned and held out the bag she had brought.
Emergency support?
Yup! Can't you smell that sweet scent wafting through the paper?
You should eat while you can.
All-nighters are a battle of endurance!
Thanks for the food.
Heheh, think nothing of it!

...Hey, Annah?
Yes, Captain?
There's only donuts in here.
Yup! I picked only the best ones.
Do I like donuts? Hmm... not especially.
They're just quick and easy to eat. That's all.
Plus, since town guards are always on the move, donuts are great for energy boosts.
That's all there is to it.
So you don't love them, huh?
Nope, I don't.
Now, which of the three would you like to try first?
This one's the plain glazed from Street Bakers.
That one's East End sugar cream! See how smooth the coating is?
And this is the all-time bestseller, the Snow White!
All three donuts looked exactly the same.
...Aren't they all the same?

...
...How could you even say that?
Look closer! This is the plain glazed.
This is the sugar cream!
And this is the Snow White!
The dough size, the cream coating, and the texture are all totally different!
I squinted and took a closer look.
...I still couldn't spot any differences.
That confused face says it all...
...You really can't tell them apart, huh. You seriously can't!
...

I can't just let this slide.
I'm not leaving here until you can tell the difference by taste!
Is this really that important?!
Of course it is!
We're talking about donuts!
You said you didn't care about donuts!
This is a totally different issue!
Now, open wide!
Wait, hold on!
Say, "Aaaaah!"
Mmfph!
I ended up eating a ridiculous number of donuts until I could tell the difference between them.
Finally... You can now distinguish their basic features...
As your teacher, I'm seriously holding back tears here!
You're officially dismissed!
Though this is my room.
Eheh, oh yeah! That's right!
Then I'll be heading off!
Don't stay up too late, okay?
If I see your lights on again at dawn, I'll show up with handcuffs and a blindfold instead of donuts!
So you'll be watching my room until dawn?
Ah, is that what I said?
...
...No comment! ☆
I'd very much like a comment, please!
See you tomorrow, Captain!
Annah left the room with a bright smile.
Thanks to the sugar overload, I was wide awake now.
But... was she really planning on keeping watch on me all night...?