Tria pondered her situation. She never wanted to look unsightly when the Lord Spirit called for her. However, making the Lord Spirit wait while she tidied herself up was out of the question.
Essentially, wouldn't it be wonderful if she could clean her body in an instant?
"Then I had an idea," Tria said. "If sticking my hands inside Miti can wash them, shouldn't I be able to do laundry or even bathe the same way?"
"I'll do it for you if you call me 'Big Sister,' okay?"
"..."
"..."
"Let's give it a try, Mi-sis."
"Yay! Your Big Sister is on the job!"
And so, the plan was set.
"So, what does your Big Sister need to do?"
"Ideally, I want my body cleaned in a single burst without having to undress. Miti... Mi-sis, I want you to gobble Tria up, clean her, and then spit her out."
"Okey-dokey, leave it to me! Open wide!"
The moment the words left her mouth, Miti gaped and lunged at Tria. Since it was essentially a Body Slam, Tria wondered if the "opening the mouth" part was strictly necessary, but she figured it was all about the mindset.
She closed her eyes and held her breath. After a squishy, wriggling sensation that felt like she was being licked all over, she was spat back out.
"Oops, sorry. Some of me stayed inside your clothes."
"I'm all slimy."
A failure. Still, Tria hadn't expected it to go perfectly on the first try.
"My face, hands, and feet feel refreshed, so is it just a matter of practice?"
"Hmm... Your chest and crotch felt kind of slippery, like I couldn't touch them."
"Mu?"
It was true. While some of the slime had remained inside her clothes, it was only on her abdomen and back. It appeared Miti was unable to make contact with areas hidden by her underwear.
"...Mumumu. Does this mean I still have to change my own panties?"
"Is that how it works? Or is it because the Lord Spirit is protecting those parts?"
"Mu? If that's the case, does it mean I shouldn't change them on my own if they're places Miti can't touch?"
"I know! They call that sort of thing 'maniac'! Or was it... 'abnormal'?"
"Heh. You're surprisingly knowledgeable, Miti."
"Because I'm the Big Sister!... Wait, call me 'Mi-sis' properly! Otherwise, I won't take the slime back!"
"Oops. Please, Mi-sis."
"Leave it to your Big Sister!"
Miti retracted the slime lingering in the clothes. Yes, the spots where it had been collected felt clean as well. That being the case, Tria wanted to find a way around the restrictions on those "untouchable" areas.
"Now that I think about it, Alto's Spirit said that things like that work if it's a combat action. What if you prick me a little?"
"I wonder? Should we try?"
"Please."
"It's 'Please, Big Sister,' right?"
"...Do I have to say that every single time?"
"Yes!"
"Please, Mi-sis."
"All righty! Open wide!"
Once again, Miti devoured Tria. Thwump!! Crunch!!
"Higyagobo!?"
"Ah, sorry! Was that a bit too much? Pweh!"
"Pwah... huff... huff... First Aid... ugh..."
Tria clutched herself and used a Recovery Skill to heal the damage. Her whole body felt refreshed, but it had been painful. On the bright side, no slime remained in her clothes this time. If she could ignore the pain, it was a success.
"I said a prick..."
"T-The force is hard to control! Sowwwy!"
"Sniff. From now on, I'm going back to just calling you 'Miti'."
"I said I was sorry!"
"Sniff."
Tria took the opportunity to drop the "Sister" title and revert to their original dynamic. She never let a setback go to waste. She was a clever girl.
"So, it's been proven that we can bypass the restriction if we include an attack. That's progress..."
"But it feels like I won't be able to touch those parts if I hold back too much."
"It's a choice between pain and time, then... What if you attack a place that doesn't hurt much?"
"Hmm. Like giving your butt some little slaps while I wash you?"
"Yes. Try it, Miti."
"Big Sister..."
"Try it, Miti."
Miti puffed out her cheeks in a pout, then performed her third "Open wide."
Slap slap, munch munch, slap slap, munch munch... Pweh!
"..."
"..."
"Success! My underwear and everything underneath are perfectly refreshed! My butt stings a little, but I can easily endure this!"
"We did it, Tria-chan!"
"Yay!" The two rejoiced with a high-five.
"I should tell Alto and Penpen about this. Gin and Nika, too. Everyone will be so happy!"
"Eh? But I don't want to do it for them because they aren't my younger sisters."
"..."
"Because I'm the Big Sister! I'll happily—deliciously—eat the dirt off my younger sister, but I don't want to do it for anyone else!"
"Mumu...!"
Since Miti was essentially eating her grime, Tria couldn't force the issue.
"It's fine if they're my younger sisters, though. Right?"
"Mumumu. It can't be helped. Hmm... Wait. Does this mean it's exclusive to Tria?"
"It's fine as long as they make a 'Sister Declaration' before using it, you know? Oh, but not Penpen. She's not a younger sister; she's Mama."
"Then it's exclusive to Tria. It's a pity I'll be the only one who stays clean, but it can't be helped. Fufufu... actually, that's fine too."
And so, Tria mastered Miti-style Instant Washing, allowing her to clean her body in seconds. As long as she was with Miti, she could serve the Lord Spirit in a pristine state at a moment's notice.
She hoped Alto and the others would enjoy their frantic rushes to the shower.