My Plain-looking Fiance is Secretly Sweet with Me

About 10 minutes had passed since Yuuka and I started our shift.
Since the busiest time was around noon, a large number of people were assigned to the cafe counter shift.
Compared to other time slots with only 2 to 3 people, 4 people were working during these 1.5 hours.
The male staff were me and Masa. The female staff were Yuuka and Nihara-san.
As it was the busiest time slot, Yuuka… looked even more tense than in the morning.
“Welcome—Oh? Could it be Nayu-chan?”
“Huh? Gross. Why is there a creepy vampire trying to hit on me… Isami, call the police.”
“Wait, wait! Nayu-chan, it’s me! Kurai Masaharu!! We met when I visited Yuuichi’s house back in Japan, remember!?”
“Ugh, this is bad… is this some kind of scam? Isami, we really should call the police.”
Even during the busiest hours, she was still harassing Masa. How strange.
Feeling annoyed, after relaying the customer’s order to the kitchen, I rushed over to help Masa.
“Nayu… if you’re going to cause trouble, you should just go home.”
“Whoa!? Now it’s the turn of the perverted tuxedo guy to threaten me! What kind of store is this?”
“Nayu-chan, that kind of joke is vulgar… I’m sorry, you two, for causing a disturbance.”
“…Tch. What’s with that adult-like attitude? It’s as if you’re saying I’m a troublesome customer.”
You are a troublesome customer.
This girl, if we weren’t in front of everyone, I would have lectured her already.
“Haa… Well, whatever. Then, Kuramasa, do your best in that Dracula costume.”
“You’re not even trying to remember my name correctly, Nayu-chan!?”
“Well then, Yuunii-sa… Yuuichi-san. Please guide me.”
“Ah, um… This way, please.”
Isami had read the atmosphere and reconsidered using the name “Yuunii-san,” then guided Nayu to a table for two.
Wearing a short T-shirt with an open collar under her usual denim jacket, Nayu crossed her legs and rested her chin on her hand, tilting her short hair. Her attitude was poor.
On the other hand, Isami was wearing a short white shirt covered by a black suit with a black tie in a butler style as usual. With her tied-up hair and azure contact lenses, she looked more like a cosplayer than anyone else in the room.
“Hey, Yuuichi… That handsome guy, is he Nayu’s boyfriend?”
“You’re mistaken, and if you say that directly, Nayu will kill you.”
It was natural for Masa to think that way, but to avoid unnecessary bloodshed, I decided to explain it to him for now.
If I were to say she was Yuuka’s sister—it would be complicated, so I’ll keep that a secret.
She’s an acquaintance of mine and Nayu’s, invited by Nihara-san this time to serve as a cosplay cafe consultant, a girl dressed as a boy… That’s how I explained it.
“Huh… I thought he was some handsome guy, but it turned out to be a girl. But why is she… fidgeting like that? Her behavior is suspicious, right?”
Yeah. I understand very well why today’s Isami is acting so suspiciously.
But I can’t tell you the reason… sorry, Masa.
“Yaho! Nayu-chi, Isami-kun!!”
Upon seeing those two—Nihara-san in a pink leotard approached them.
Both Nayu and Isami froze for a moment… at the sight of that outfit that exceeded their imagination.
“…Nihara-chan. Um, is this an 18+ establishment?”
“What are you saying, Nayu-chan? But, Nihara-chan sounds good too!! Feel free to call me that from now on.”
“…Momono-san. I advised you so much, yet you’ve turned into… what exactly?”
“Maid outfits, cheerleader outfits, witch outfits… everyone’s wearing cute clothes! So I wanted to wear something cool to stand out.”
“C… cool… huh?”
“What is this gyaru lady talking about? It’s scary.”
Amidst that increasingly chilly atmosphere—
A maid quickly brought water to Nayu and Isami’s table.
“Welcome, dear guests.”
“…Thank you.”
Isami was about to say something, but upon receiving the glass of water, she lowered her head.
Nayu leisurely looked at Yuuka and Isami’s attitude.
“…What would you like to order?”
“Then I’ll have a café au lait. What about you, Isami?”
“Ah, um… black coffee.”
“Both hot, correct?”
Although her tone was a bit stiff… compared to the morning, Yuuka was trying her best to serve customers. Perhaps because she was standing in front of Isami.
After receiving the order, Yuuka relayed it to the kitchen.
“Hey, come check out this shop!”
At that moment.
A woman with long blonde hair and another with curly black hair suddenly entered the store.
“Welcome, dear guests.”
Yuuka bowed deeply and guided them to their seats.
Both women had thick makeup, flashy nails, and jewelry… they gave off the impression of genuine party girls.
Yuuka stepped towards the two party girls to take their orders.
“…What would you like to order?”
“Click,” the chair behind me suddenly made a sound.
“Isami, sit down.”
“Thud,” what was that sound this time?
When I looked back—I saw Nayu pushing the table towards Isami, who had stood up at some point.
That attack caused Isami to clutch her stomach in pain and sit down.
“…Nayu-chan. Didn’t you go too far just now?”
“Huh? It’s because Isami was about to do something unnecessary. You were about to rush over to help Yuuka-chan, weren’t you? You’re being overprotective, seriously.”
What are these kids doing… I thought in bewilderment.
“Oh, this outfit looks cute. Hey hey, do you wear this in front of your boyfriend?”
The blonde woman suddenly made a joke towards Yuuka after she had taken their order.
Following suit, the black-haired woman also struck up a conversation with Yuuka.
“Hey hey, we’re graduated students, you know. Cute little maid, would you like to serve us for free?”
“…What are you saying?”
“Ahaha! Just kidding. No need to be so serious, smile more. You looked so dull earlier.”
At those words, Yuuka’s expression—suddenly froze.
“Oh, but when we were in school, there was someone like that too, right? I think it was in the second year. That girl was the type who never smiled at all… What was her name again?”
“Eh, I don’t know. Was there someone like that? My memory is terrible. I can barely speak English, so how could I remember such a bland student?”
I painfully understand her emotions right now. Perhaps because of the atmosphere created by these two party girls…
It reminded Yuuka… of when she stopped going to school during junior high.
I need to help her quickly. I thought this and was about to rush over as soon as possible.
——But, I wondered if that would be the right thing to do, and I stopped in my tracks.
Reaching out to help now would be very simple.
To prevent Yuuka from getting hurt, I just needed to serve the customers in her place and separate those two from her.
But… Yuuka had decided to take steps forward at school.
Would doing that really—be considered helping?
“Wait!? Isami, I told you not to stand up…”
“I can’t let that happen!!”
Isami shouted at Nayu so loudly that her voice echoed throughout the store.
When I turned around, I saw Isami in that state, ready to rush out at any moment even though Nayu was pulling on her coattails.
The two unusually haughty party girls were also in an uproar.
Faced with this scene… I made up my mind and stepped forward firmly.
“Dear guests, may I ask what the matter is?”
In a pristine white tuxedo.
I bowed respectfully——in front of Isami.