After playing on the island for another two days, a new week rolled around.
With no Momo and Nana around those two days, Shichen lost a lot of his fun and could only occasionally bully Yami a bit instead.
Sparring underwater for several hours against Yami in her Darkness mode was still pretty thrilling.
Even though he was satisfied, Shichen still really missed Momo.
Who wouldn't miss a little sister–in–law who constantly praises you and always thinks about you?
It had already been a week, and the two still hadn't come back. Shichen was starting to suspect Momo might have failed to persuade his father-in-law.
That didn't make sense, though.
The old man had already acknowledged him. With that, he shouldn't be stopping Momo and Nana from coming to this planet to play.
Shichen decided to wait another week. If they still didn't show up, he'd go look for them himself.
It had been fine before, but after those two days of getting along with Momo, a world without the little sister-in-law felt a lot less fun.
Without a little sister-in-law, life really was incomplete.
In the principal's office, Shichen was sprawled in his chair spacing out for a bit, then got ready to go find Mikado Ryōko to deepen their bond.
His top priority now was to give Mikado some kind of self-defense ability.
Definitely not because he was greedy for her body.
After the crazy fun he'd had with Yami yesterday, his desire was actually pretty low at the moment.
"Hm?"
But just as he swung his legs down off the desk, his eyebrows knitted together. He sensed spatial fluctuations right there in his office.
They were coming from Lala's hidden chamber.
Who would dare barge into his territory?
Shichen was just about to probe the intruder's presence when the door of the secret room slid open, and a pink figure stepped out hesitantly.
"B-Brother-in-law."
"Momo?" Shichen blinked in surprise at the girl who appeared.
Pink bob cut, a soft, delicate face, and a black-and-green halter-neck dress with frills.
Exactly the same as when they'd first met.
"I-I'm back~" Momo forced out a shy smile.
"Momo, you finally came back." Shichen stood up and happily walked over.
"Um… yeah." Momo flinched like she'd been startled when he got close, retreating half a step before forcing herself to stop.
Shichen didn't notice her little reaction. He stopped in front of her and pulled her into a hug.
"Eh?" Momo froze like someone had hit pause.
"What's wrong? It's only been a week, you embarrassed now?" Shichen let her go and looked at her in amusement.
"N-No…" Momo's complexion visibly got better by the second.
"Really embarrassed, huh?" Shichen didn't think much of it, leaned down, and gave her a quick peck.
"!"
Momo completely short-circuited.
"Momo?"
Only then did Shichen realize something was off. This really didn't feel like Momo.
The Momo he knew would be over the moon—probably even kiss him back on her own.
No way she'd stopped liking him after just a week apart, right?
If she didn't like him, she wouldn't have come back, and she hadn't exactly rejected his advances just now.
Watching the girl who was completely stunned, Shichen started thinking it over.
"Y-You… you've already gotten that far with Momo!" she suddenly blurted, face scarlet, pointing at him in outrage.
"Hm? Momo and I…?" Looking at her mix of shame and anger, Shichen had a pretty good idea.
"You wouldn't happen to be… Nana, would you?"
"Eh? I-I'm not Nana," "Momo" froze, then rushed to deny it.
Seeing that reaction, Shichen knew exactly what was going on. The two of them had probably used one of Lala's inventions and swapped bodies.
Her inventions had issues, sure, but they were seriously impressive.
"Oh, so you're not Nana, huh? Then I guess it's fine if I do a few things," Shichen said, eyeing her mischievously.
"D-Do what? W-What are you planning to do?" "Momo" asked nervously, her heart pounding.
"What do you think?" Shichen asked as he slowly leaned in.
With an opportunity like this, how could he not take advantage?
The two sisters had obviously swapped bodies. Whose idea it was he couldn't be bothered to guess—either way, if Nana dared to show up in Momo's body first, that meant she'd mentally prepared herself.
And Shichen didn't believe for a second she hadn't already guessed there was something going on between him and Momo.
"W-Wait… w-wait, don't—mmph!"
Momo's mouth was covered mid-sentence. She had absolutely no strength to resist.
Her eyes went into full "loading" mode, completely stunned by what was happening.
If she was Nana, then this would be her very first kiss, and that earlier little peck hadn't really registered.
Now, getting hit with a proper kiss like this, her mind went blank.
So this was kissing?
Why did it feel like this?
Her heart was racing like crazy!
In her head there was only this one thought; she didn't even think about pushing Shichen away.
Not that she'd be able to, anyway.
Shichen tightened his arms around her and, without holding back, slipped her lips open and sought out her tongue, wrapping around it.
"Mm!" Momo's eyes went even wider.
She could clearly feel a jolt like electricity rippling through her whole body—insanely intense.
Kissing could feel like this too?
In no time she was completely lost in his skilled technique, dazed and intoxicated, until—
"Mm!"
Momo suddenly snapped her eyes open, found some unknown reserve of strength, broke away from him and shoved him off, clutching her chest and panting.
"How could you…!"
"Ahem. My hand got a bit carried away," Shichen smacked his own right hand with his left.
"You mean you and Momo have already gotten that far?" she demanded, contradicting herself.
"That we haven't," Shichen shook his head. "I just got swept up in the moment."
"You think I'm going to believe that?" she glared at him.
With how natural he'd been just now, she seriously doubted they hadn't done this before.
Still… so this was what it was like to be "bigger"?
It was a weird feeling.
"Seriously—"
"I can't watch this anymore!"
A crisp, girlish voice cut him off as Nana came barreling out of the secret room.
She was wearing the same outfit as when she'd first met him—a black-and-red strapless dress and twin tails.
"Brother-in-law!" the moment Nana stepped out she dove straight at Shichen.
He caught her out of reflex, and she happily rubbed her head against his chest.
"Momo, what do you think you're doing?!" "Momo" snapped.
"Hmph! You already used my body to do that kind of thing with Brother-in-law, and now I'm not even allowed to hug him?" Nana pouted.
"T-That was… that wasn't me, that jerk forced me!" "Momo" retorted.
"Yeah right. You were clearly enjoying that kiss. I've never even done that with Brother-in-law!"
"I-I wasn't enjoying it!" "Momo" went even redder.
"Hmph! I want in too!" Nana said, looping her arms around Shichen's neck and pulling him down into a kiss.
Shichen stared at her face up close, blinked once, then cooperated.
"Wh-what…?" "Momo" just stood there watching, feeling strangely conflicted.
That was her body, but all she could do was watch as her own body kissed that guy.
And it was getting more and more heated.
She should stop them, but for some reason she really didn't want to. She was totally glued to the scene.
Shichen and Nana kissed like no one else existed, until Nana simply ran out of breath and pulled away.
"Hah… hah… ugh, this body's too small—Brother-in-law doesn't even want to use his hands," Nana complained, cupping her chest.
"What are you saying?!" "Momo" rushed over and smacked her hand away in a panic.
"It's true though."
"You…"
"I don't want to stay swapped anymore, let's switch back," Nana said.
"Fine, let's switch! What's so great about being big, your shoulders just get sore!"
"Hmph, jealous much."
"I'm not jealous! And this is all your fault—now my body and my soul are both tainted!"
"You agreed to it yourself, how is this my fault?"
"I never should've listened to you!"
"Taking advantage and playing the victim, huh."
Still bickering, Nana pulled out her phone, tapped a few times, and both girls lit up in white.
The light lasted about two and a half seconds before fading. On the surface they looked the same as before, but their expressions were different.
"Brother-in-law!" Momo threw herself back into Shichen's arms, eyes sparkling.
This time, it really was Momo.
Shichen hugged her and shook his head, amused. "You two have barely set foot back here and you're already playing tricks on me."
"We just wanted to have a little fun; in the end I totally got the short end of the stick…" Momo pouted.
"I'm the one who lost out!" Nana said, exasperated.
"What did you lose?"
"I got kissed by that creep! In both body and soul! And he already saw me naked before this!"
"Hmph, you sure looked like you were enjoying it just now."
"I was not!" Nana shot back immediately.
"You totally were."
"Was not!"
"Were too!"
"Not—"
"Alright, alright. How do you two start bickering the second you walk in?" Shichen cut in to calm them down.
"Because it's her fault! If I'd known, I never would've listened to her. 'Let's see how he reacts,' she said…"
"So what exactly happened?" Shichen looked down at Momo and asked.
~~~
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