It has been a while since the communal life of Naoya, the Fushiguro family, and the twin sisters began. At the end of spring, with the summer when cursed spirits swarm like maggots fast approaching, a rare visitor had come to Naoya.
"Tsukumo-san? Are Special Grades free? Why come all the way to a place like this?"
"I heard Naoya-kun has become something interesting after I got back to the country, you see? I thought I'd do some fieldwork while stopping by to say hello."
"Just taking care of some brats isn't particularly interesting, I don't think."
"Now, don't say that. You're living together, aren't you? With the 'Sorcerer Killer'."
Saying so, the one distorting her beautiful face into a grin is the Special Grade Sorcerer, Yuki Tsukumo. She is the sole woman among the three Special Grade Sorcerers in Japan, whom Naoya, having strong respect for the strong, deems worthy of addressing with '-san'.
Naoya, who has a reasonable personal acquaintance with her, seemed to have an idea of the 'Sorcerer Killer' mentioned by her unannounced visit, and nodded with a look of realization.
"Ah, that guy? If it's Toji-kun, he's at pachinko. ...Is it research on Heavenly Restriction?"
"Well, something like that. Of course, I'm also curious about you, who is a postnatal and artificial Heavenly Restriction. —By the way, what kind of woman is your type?"
"That again? A big-tits-small-waist, big-ass big sister. Someone like you is totally my type."
"Fufufu, as always, 'No surprises, but energetic is good!' sort of vibe. Well then, I guess I'll wait for 'Toji Fushiguro' here. Is that okay?"
"I don't mind. Want to wait while sipping some tea? I bought good ones in Uji recently. For tea snacks though, only Bonchi crackers. Come on inside, outside is whatever."
"Oh, are you sure? Then I won't hold back. ...Even so, has your cursed energy amount increased again? You really are non-standard. Are the contents of your bindings unchanged?"
"That's right... Prohibition of disclosure... can you bind?"
"Of course. I swear not to disclose the contents of your bindings to others without your permission. This is a 'Binding'."
After she declared so and took out a notebook and pen with eyes shining with the light of curiosity, Naoya let out a sigh and opened his mouth while brewing tea.
"Then it's fine. ...Ten Bindings, no changes made. Shall I explain one by one again?"
"I'd like that. It's similar but different to my goal, but your approach to cursed energy is interesting."
"Is that so? ...First is number one, 'Poetry Recitation'. As you can hear, speech restriction. Five-seven-five, or five-seven-five-seven-seven. This rhythm, absolute compliance. Too many syllables or too few syllables are prohibited."
"Yeah, yeah. No matter when I hear it, the very first one is too inconvenient! You could say it's ridiculous. Speaking of speech restrictions, the Inumaki family's 'Cursed Speech' is famous, but they can speak if they want to. But Naoya-kun, you 'cannot speak otherwise', right?"
"■■■■—. That is correct. Just trying to say 'That is right' just now, my mouth wouldn't move."
"I see, I see... So, what did you 'gain' in exchange for such a messily inconvenient life?"
"Chanting is done without doing it. Of course doing it doubles the effect."
As Naoya announced this, Yuki was scratching down notes and nodding with deep interest.
At that time, Naoya was burning the image of her breasts, which were shaking heavily, into his eyes and firmly storing it in his brain folder, but since Naoya is a boy, that cannot be helped.
"I see. That seems unchanged too... So, the second one?"
"'Promoting Good'. Any choices made at any time, only good deeds can be chosen."
"This is also quite abstract, isn't it? I'd like a little more detail."
"...Tsukumo-san, have you ever played video games? Especially love or otome games."
"I don't have experience, but I roughly understand the content."
"Choices appear sometimes in games right? That becomes 'Good Deed', the only choice."
"Ahh... I kind of get it. But who decides that 'Good Deed'?"
"I don't know. It's just my guess, maybe collective consciousness? You could say 'Common Sense' here. Or maybe ethics and morality."
"Scary\~. But well, I wonder if the 'Heaven' in Heavenly Restriction is unexpectedly something like that...?"
"Number three, 'Punishing Evil', is also similar. Hostility to 'Evil' is made mandatory. Both of them, effect is the same, dramatically cursed energy efficiency improved."
"I see... Life seems troublesome, truly. Assuming they haven't increased since before, there are still 7 more, right?"
"That is well, troublesome, honestly speaking. Even so I have no regrets at all. ...Shall we take a little break? I'll serve tea snacks. Wait a moment, where did I put them..."
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