According to Maria, the succubus, Mio had used those two treasures of hers to seduce Takumi, rapidly closing the distance between them again and again.
That was why the two of them had already become so intimate, while Takumi still continued treating Yuki with such respectful restraint.
The thought made Yuki furious inside.
Damn that "G." It looks almost the same as my "C," yet it's a full four sizes bigger! With weapons like those at her disposal, no wonder someone as innocent as Takumi couldn't resist.
"What's wrong, Yuki?"
As though he had just heard something rather incredible, Takumi couldn't help turning around and asking again.
He could have sworn he had just heard Yuki being jealous of Mio's figure.
Faced with his question, Yuki shook her head and put on an expression that said she hadn't said anything at all.
Sure, she wanted nothing more than to eliminate Mio's Demon Lord-class breasts along with Mio herself, but there was absolutely no way she could say something like that out loud.
Besides, after her conversation with Maria earlier, Yuki had already made an important decision.
"Takumi~ I want to form a master-servant contract with you too."
When she said that, Takumi looked briefly dazed.
He had been using [Divine Envoy Pieces] for so long that he had almost forgotten master-servant contracts even existed.
Did Maria tell her about this?
"Do you know what that actually means?"
"I do. And I've already prepared myself for it!"
Yuki's expression was unwavering. She had already questioned Maria in detail about all the advantages and drawbacks.
As far as Yuki was concerned, none of them posed a problem.
Besides, according to the teachings of Maria the succubus, if a woman let the man she liked massage them, they would gradually get bigger.
As long as Yuki could become more intimate with Takumi, there was still a chance she could catch up!
At least, that was the tiny shred of hope she was still clinging to.
More importantly, Mio and the others had all accepted this master-servant contract.
Yuki firmly believed that she wouldn't lose to Mio in this regard.
And when it came to displaying her courage, she was undoubtedly the one with the advantage.
"So... please let me become your servant and slave!"
"Cough, cough! Don't say that out loud in front of everyone!"
Seeing Kurumi, Zest, and the others nearby looking over in confusion, Takumi suddenly felt mortified.
He was genuinely touched to hear his childhood friend say something like that, but there was a time and place for everything!
"This... this is..."
"Onii-chan, you'll agree, right? This is her heartfelt wish, after all~"
Maria chose that moment to pop out of the room, speaking with a mischievous smile.
Takumi immediately realized that Maria had been the one egging Yuki on behind the scenes, and he nearly gave both of them a chop on the head right then and there.
That said...
He was actually looking forward to it.
After taking a deep breath, Takumi gave a slight nod and motioned for Yuki to follow him.
If she wanted to formally go through the process, then he was willing to do it properly.
Mio, who had been taking a bath, heard the commotion outside. She hurriedly scrubbed herself a few times, cast a Cleaning Spell, and came straight out.
Takumi already had plenty of women around him, but Yuki's position was different in Mio's eyes.
For one thing, the two of them were classmates and had seen each other fairly often before. They had even clashed in the past.
More importantly, Yuki was Takumi's childhood friend, which greatly intensified Mio's sense of danger.
Even though Mio felt threatened, however, she couldn't exactly stop what was happening.
After all, even Tohru, his maid, didn't dare make too much of a fuss in front of Takumi these days.
Just as Yuki was about to follow Takumi, Maria stepped forward and blocked their path.
"Onii-chan, since we finally have a formal contract ceremony for once, I think we should follow the ancient traditions!"
"..."
Seeing Maria put on such a serious expression, Takumi knew immediately that she was planning something.
Still, he was genuinely curious to see what she intended to do.
"All right, all right. We'll do it your way."
"Hehe~ Then Onii-chan, stay outside for a little while."
With that, Maria grabbed Yuki and pulled her into Takumi's bedroom.
The women left in the living room all watched curiously.
"What's a master-servant contract?"
Irina and Kurumi both immediately began asking questions.
Takumi awkwardly turned his head aside and answered quietly, "It's a kind of contract magic. Basically exactly what the name implies."
"A master and a servant?"
Kurumi exclaimed in surprise, and Irina immediately understood as well.
"If it's a master-servant contract, why was she so... excited about it just now?"
Even Zest looked curious.
From what she knew, master-servant contracts were terrifying things. Their effects could be so deadly that demons had gradually abandoned their use.
This was the first time she had ever seen someone actively request one.
Takumi could only choose his words carefully as he explained, "The succubus race modified the master-servant contract, so it isn't quite as lethal anymore. The curse was changed too. Now it only gradually burns out your brain."
"Burns out your brain? What does that mean?"
Kurumi and Irina both looked at him with innocent confusion.
One had been born in the Village and had never attended school, having been raised entirely as a warrior.
The other had grown up believing in God and training as a Holy Sword wielder, so she hadn't exactly been exposed to such matters either.
As a result, even after Takumi explained it, neither of them really understood.
Zest, however, understood a little.
It wasn't that she was particularly impure. She had simply spent the previous few days monitoring Takumi and had ended up witnessing far too many... "stimulating" scenes.
Just as the room fell into a strange, confused silence, Maria's voice came from inside.
"Onii-chan, come in!!"
Judging from her tone, she sounded extremely excited.
Seeing the curiosity on Kurumi and Irina's faces, Takumi could only get up and head toward the room.
Then, one after another, all the girls filed in behind him.
Even Yuki Suou came along to watch the fun.
That was finally more than Takumi could take.
"What the hell is this!? Why does this feel like my public execution!?"
"Out! All of you, get out!!"
Takumi shoved everyone back out of the room and locked the door behind them before finally letting out a breath of relief.
Then he turned around.
Runes drawn across the floor formed an enormous magic circle, with Yuki standing at its center.
That alone would have been fine.
The problem was what Yuki was wearing.
A sexy white bustier and garter belt.
The outfit perfectly emphasized Yuki's shapely figure and long, slender legs.
This was obviously the kind of decisive outfit someone only wore in private!
"I don't remember having anything like that in this house!!"
Faced with Takumi's questioning, Yuki blushed faintly and answered shyly, "I told Maria that I didn't want to lose to Naruse-san... so she gave me this to wear."
"No, why are you competing with Mio in the first place!? Yuki, don't let Maria fool you. She just wanted to see you dressed like this!"
"Onii-chan, that is a terrible misunderstanding. I was merely fulfilling Yuki-onee-san's wishes."
"Like hell you were! You definitely just wanted to use this as an excuse to have some fun!"
Seeing that Maria had already set up a camera, Takumi didn't believe her for even a second.
...
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