Volume 3 Chapter 12 Let's Make a Contract (Kiss) with My Sister
After defeating one of the Ten Commandments, I returned to the Demon Lord's country.
'Big Brother! Welcome back!'
The moment I stepped into my room, Haku—the daughter of the Divine Beast King—lunged at me.
A fluffy white dog slammed into my face with a soft thump.
"I'm back, Haku. Did you behave while I was gone?"
'I was super good! I waited with Sia and Cino!'
My little sister, Cino, stood nearby with Sia—the tiny blue dragonling—perched on her chest.
"Welcome back, brother."
"Yeah, I'm back."
Then something clicked in my mind.
"...Wait. Why are you all in my room?"
"Brother's futon..."
"Futon?"
"N-No! It's nothing!"
Cino turned away, cheeks puffed in protest.
'...CinCin. Brother's futon. Sniff sniff.'
'You were sniffing it, weren't you!?'
The Divine Beast kids tilted their heads innocently as Cino's face burned red.
"I-I wasn't! I mean—It's not like that...!"
"Good grief. Still such a kid."
I gently ruffled Cino's hair.
"Stop treating me like one..."
She huffed, face a mix of embarrassment and frustration.
"You'll always be my little sister, you know."
"...Ugh. I've got a long way to go... I won't lose."
Muttering to herself, she clenched her fists with newfound resolve.
"By the way, big brother, where've you been?"
I flopped down on the bed and explained the situation with the Majin Legion and the Ten Commandments.
Partway through, the Divine Beasts dozed off on my lap, their peaceful snores filling the room.
"So, the majin are making moves..."
Cino's expression turned serious.
"We need to bolster the kingdom's defenses."
"Yeah. If I'm away, they might attack directly."
Unlike our hidden outposts, this place wasn't exactly a secret.
"Then I've got an idea!"
Cino suddenly grabbed my hand, eyes shining with excitement.
"From now on—let's form a magic contract!"
"...Come again?"
"A Magic Contract!"
Her words tumbled out in a rush:
—It creates a magical pathway between people.
—It lets one person supply magic power to the other.
"Brother, with your Heart of Divine Magic... you've got an endless supply of magic, right? If we form a contract, your friends could use magic freely, just like you!"
"Ah, I get it. That'd be a huge help."
"Exactly! You're quick on the uptake—makes things easier!"
Her grin widened... then faltered.
"To form the contract, um... there needs to be some kind of... physical connection."
"Okay...?"
Her voice dropped to a nervous mumble.
'M-Most people do it with... a kiss.'
"...Wait, seriously?"
Face flaming, Cino glanced away.
'I-It's just for the magic link! Not like I'm suggesting anything weird...!'
Yeah... having a "night together" with my sister was way off-limits. Not happening.
"So... um..."
Cino closed her eyes and tilted her face up, lips slightly pursed.
...Honestly, looking at her now, she really had grown.
Her silver-blue hair shimmered like silk, framing her delicate face.
But still—family is family.
I placed a hand on her shoulder and gave her a quick, light kiss.
Then—
Hummmm...!
A surge of magic erupted from her body like a dam breaking.
"Whoa—this is... brother's magic! It's so hot...! The power—it's incredible...!"
Cino's eyes sparkled as the energy coursed through her.
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