A Detailed Explanation of the Human Musculature and Skeleton

The moment her soft, shower-gel-lathered palm made contact with the skin of my back, I couldn’t help but shudder.

It wasn’t a shiver from the cold, but more like the reaction you get when a nerve-dense part of your body is touched. Like how most people are ticklish on their waists; a playful poke from a friend can make your whole body jolt. That’s what I was feeling right now.

I’ve been showering for so many years, I thought, and I’ve never had a full-body spasm from putting soap on my back. My god… What kind of dark magic is Exusiai using?!

I stared at the tiled wall, wet from the warm stream of water, but my attention was entirely on Exusiai’s hands behind me.

First, she skillfully gathered my loose, long hair over my shoulders and brought it to the front. Then, her small hands began to rub my back. The shower gel in her palm was cool, but her palm itself was warm from having just washed her own body. Now, pressed against my back together, the mix of cool and warm, sliding and rubbing, sent another shiver through me.

I had no idea which parts of her own body Exusiai had just washed with those delicate hands. But I figured, if she was using those same hands that had just cleansed all those parts of her body to scrub my back, didn’t that count as indirect contact with all those soft, delicate places?

The angelic girl followed a top-to-bottom sequence. First, her slippery, soft hands kneaded my shoulder blades, then traveled down along my spine, not missing a single rib on my back, until she reached my hips, and finally, the place where the cleft began to form near my tailbone.

And then she wanted to go lower.

“Any lower and you’ll just be scrubbing the stool!” I couldn’t help but blurt out.

“Oh, oh, then… time to go to the front~” Her tone rose teasingly at the end, and then her delicate-feeling palm slid forward from below my tailbone.

“Stop! Yamete!” I felt that sinful thing of mine raise its proud head again. Thankfully, the stool was low, so I could bend my knees and hold it between my thighs and abdomen, as if hugging my knees.

A bell-like laugh came from the pretty girl behind me. It was the most girlish she’d laughed since her transformation. She said, “Don’t hide it~ We’re brothers, what haven’t we seen of each other!”

Why did you have to say “we’re brothers” at a moment like this♀? The atmosphere instantly changed to a buddy back-scrub♂!

My face must have been beet red. I hugged my long black hair and my knees, pouting and saying nothing.

“Alright, alright, I’ll stop teasing you~” Exusiai said, gently patting my head with her nimble, slender hand. Then I heard her stand up and turn the showerhead on with a creak.

Before I could react, a stream of hot water gushed onto my back. The sudden warm sensation startled me, making me jump up a little from the stool, and my legs naturally spread apart.

Without any cover, a certain something was exposed to the bright lights and flowing water.

“Ooh~~” the boyish girl behind me clearly saw everything, letting out a suggestive sound with her refreshing voice.

My heart pounded against my ribs. Worried she would say something I couldn’t handle, I immediately turned around and covered her mouth.

Her wet lips pressed against my palm, slippery, but that wasn’t the main point. The main point was that when I turned around, we were face to face, and a certain something that had no business being in this women’s bathhouse inevitably pressed against her body.

In that instant, the air seemed to freeze.

Exusiai definitely felt it too, but she didn’t pull away. She just raised a handsome, apple-red eyebrow at me, stuck out her tongue slightly, and licked my palm with its cool tip, making me subconsciously let go.

She laughed nonchalantly. “Alright, switch! Your turn to scrub my back~”

What kind of switch was this…

A sudden counter-attack!

After I rinsed the shower gel off my body, she patted my clean back, turned off the showerhead again, and gently guided my waist with her hands to switch places with me. She sat on the stool I had just been on, and I sat on the one she had just been on.

The stool Exusiai had just been sitting on was a little wet, which must have been from the water on her body and couldn’t be anything else. And since I was sitting on the stool she had just been on, didn’t that count as indirect contact with her? Here and there, indirect contact.

Exusiai generously exposed her entire stunningly beautiful back to me and said in a deep voice, “Come on!”

“Why do you sound like I’m about to duel you…”

“That’s right, it’s a duel!” Unexpectedly, she got excited. “A duel to see who gets a hard-on first loses!”

“I’m not competing with you!!”

Exusiai was the thinnest of the three of them—her, Yukino, and Saber. The faint outlines of her bones were visible on her delicate back. Each exquisite vertebra, each slender rib, supported the flesh in an extremely sexy way.

Her back was flushed pink, and I couldn’t tell if it was from the hot water or just from her own excitement. I swallowed, carefully trying not to press against her, sniffing her fragrant scent as I squeezed some shower gel into my palm.

Because of the rising steam and her racing blood, Exusiai’s invisible, delicate pores seemed to open slightly, releasing the scent of her body. To me, it was a fragrant scent, not of flowers, not of perfume, not of food, but something lighter, more subtle, a scent that could gradually intoxicate you. This was probably the scent of her own unique pheromones.

I slowly placed my shower-gel-lathered hand on the slender girl’s flushed pink shoulder. Just like what happened to me, I felt her delicate body tremble slightly as if my palm carried an invisible electric current. Her muscles quivered and twitched under my palm, like a living creature, very cute.

I first rubbed her trapezius muscle, which connected her neck, shoulders, and spine. The slippery shower gel made a soft “squish-squish” sound. Her skin was very smooth, and with the shower gel, it was even more so, offering no resistance. I had to use a lot of force to make sure I scrubbed her clean.

Exusiai’s body leaned slightly forward, her bare arms resting on her knees for support, her trembling body enduring my kneading.

What kneading? This is just a normal back scrub, okay!

“Mmm… mmm~” A pink-tinted hum escaped Exusiai’s nose, like a dream-like murmur, or a lament, tinged with a bewitching color.

Don’t make that sound! Anyone who didn’t know better would think I was doing something to you!!