While Su Mu was still engrossed in the reflection before her, the image of a daring, almost dangerously alluring woman stared back.

The changing room door creaked open with a slow, deliberate sound that made her jump. 

Her heart leaped into her throat. She turned around with a swift motion, the leather of the corset creaking softly with the sudden movement, her eyes widening as she realized she wasn't alone.

There, leaning against the doorframe, was another woman. 

She looked to be around Su Mu's age, perhaps a year or two older, with long, lustrous black hair that cascaded over her shoulders like polished obsidian. 

Her figure was a perfect hourglass, accentuated by the outfit she wore—a vibrant red nightgown, crafted from a sheer, lace-trimmed material that clung to her curves. 

It was a stark, fiery contrast to Su Mu's black leather and lace outfit. 

A deep slit ran up one side of the nightgown, offering an enticing glimpse of a smooth thigh. 

The neckline plunged daringly, and through the delicate fabric, Su Mu could clearly see the proud swell of her breasts and the distinct, erect outline of her nipples. 

A playful, knowing smirk danced on her lips, her dark, purplish eyes sparkling with amusement.

Su Mu instantly recognized her. Xu Er, one of the six women she saw when she entered the store.

Sister Shi hadn't had the chance to introduce her earlier because Xu Er had been busy with a customer, but Sister Lin had filled Su Mu in. 

According to Sister Lin, Xu'er was not only strikingly beautiful and around Su Mu's age but also possessed a unique heritage: she was half-Succubus.

"Well, well, sister Su," Xu Er drawled, her voice a husky melody that seemed to vibrate in the small room. 

She pushed herself off the doorframe and sauntered in, her movements fluid and captivating, like a cat assessing new territory. 

Her eyes, the color of dark, rich purplish, raked over Su Mu from head to toe, lingering for a moment on the cinched waist and the swell of her breasts above the corset. 

"Feeling a bit… embarrassed? Or perhaps, is it your first time dressing like that?" she teased, her eyes glinting with a mix of teasing and something else, something warmer.

Momentarily caught off guard, Su Mu felt a fresh wave of heat rush to her cheeks. 

The initial surprise of being discovered was quickly followed by a familiar, yet intensified, flush of embarrassment. 

This wasn't just Sister Lin or Sister Shi she came in contact with; this was Xu'er, a half-Succubus, whose very presence seemed to amplify the already horny atmosphere of the store. 

Every move of Xu Er, seemed to have some kind of special effect on her, tempting her and making Su Mu's body involuntarily horny.

As a man and a virgin in her previous life, when had she ever had a chance to get close to such a beautiful and tempting woman, who happened to be a succubus?

Hardly controlling herself, she managed a sheepish smile, her hand instinctively going to smooth down the lace of her skirt, showing a nervous gesture. 

"I… I guess so," Su Mu stammered, her voice barely a whisper. "It's a bit different from what I'm used to. More than a bit, actually."

Xu'er chuckled, a low, throaty sound that sent an unexpected shiver down Su Mu's spine. 

"Different can be good, don't you think?" She moved closer, her playful sway bringing her within arm's reach. 

The subtle scent of exotic flowers and something uniquely her, a hint of musk and sweetness, reached Su Mu. 

"You look fantastic," Xu'er continued, her voice dropping a little, her gaze direct and unwavering. 

The compliment wasn't just polite; it felt genuine, carrying an undercurrent of appreciation that made Su Mu's pulse quicken. 

There was a mischievous twinkle in her eye that suggested she knew exactly the effect she was having.

As Xu'er complimented her, Su Mu found her eyes drawn to the details of Xu'er's own attire. 

The vibrant red fabric seemed to shimmer in the changing room's soft light, and the slit in the nightgown moved with her, offering tantalizing glimpses of her leg. 

But it was the sight of her large, full bust, so clearly defined beneath the sheer material, with her nipples proudly erect and visible, that made Su Mu's breath catch. 

It was a bold, unapologetic display of sensuality that was both intimidating and incredibly captivating. 

Su Mu had never encountered anyone so openly confident in their allure, and the succubus heritage Sister Lin had mentioned suddenly felt very, very real.

"Th-thank you," Su Mu managed, her voice a little breathless. 

Somehow, she found herself unable to look away from Xu'er, a strange fascination mixing with her flustered state. "You… you look amazing too. That color is… very striking on you."

Xu'er's smirk widened into a genuine, dazzling smile. 

"Red is my favorite. It matches my… nature." She took another step, closing the small distance between them, her hip brushing lightly against Su Mu's. 

The contact was fleeting, yet it sent a jolt of awareness through Su Mu. 

"And black suits you, Sister Su. It brings out the mystery in those beautiful emerald eyes of yours." Her gaze flickered down to Su Mu's lips for a fleeting second before returning to her eyes, a silent invitation hanging in the air.

Su Mu felt a warmth spread through her, a pleasant tingling sensation that had nothing to do with embarrassment anymore. 

It was something new and exciting she hadn't felt before. 

The way Xu'er looked at her, the way she spoke – it wasn't just teasing; there was an undeniable pull, an interest that felt mutual, even if Su Mu hadn't consciously acknowledged it until this very moment. 

The memory of Lingxi was a soft, comforting warmth, but this… this was not a spark, but a sudden, intense flame.

The warmth from Xu'er's body seeped through the thin fabric of her nightgown and the surprisingly cool leather of Su Mu's corset. 

It was an intimate, encompassing heat. The scent of those exotic flowers and that unique musky sweetness intensified, clouding Su Mu's thoughts.

"Don't be so stiff!" Xu'er exclaimed, and Su Mu could feel the vibrations of her voice against her back. 

She could feel a playful glint was evident in her tone even without seeing her eyes. 

"Let me help you relax a bit," she added, her voice dropping to that inviting, husky murmur again. 

Before Su Mu could react, Xu'er's fingers, surprisingly gentle, deftly moved her silver hair to one side, exposing the sensitive skin of her neck. 

Then, Xu'er's arms wrapped around her waist, pulling her back snugly against her own body in a tight embrace. 

The bold red of the sheer nightgown seemed to swallow Su Mu in a sudden, unexpected warmth and softness.

"Ahaaa… This... what are you doing?" Su Mu questioned, her voice a mixture of surprise and a definite hint of unknown innocence. 

Her breath hitched. 

The unexpectedness of Xu'er's movements had completely caught her off guard. 

She could distinctly feel the soft, full curve of Xu'er's breasts pressing into her back, a sensation that was overwhelmingly and startlingly intimate. 

It was a far cry from Lingxi's more hesitant, tender touches; this was confident, assertive, undeniably sexier, and she was bolder than Lingxi.

In response, Xu'er just chuckled, the sound was a low, mischievous rumble that seemed to vibrate right through Su Mu. 

"Just helping you get into the RomantiX spirit, Su Mu," she replied, her lips brushing lightly against Su Mu's ear as she spoke. 

The light touch sent a jolt, like static electricity, down Su Mu's spine. 

Xu'er maintained the embrace with a playful yet assertive hold, her body fitting against Su Mu's as if they were two perfectly matched puzzle pieces.

Su Mu, who was already struggling to reconcile the daring outfit with her own internal landscape, found her urges – a confusing mix of curiosity, apprehension, and a burgeoning, unfamiliar excitement – thrown into turmoil. 

The logical part of her brain, the remnant of Su Yang, screamed that this was too much, too fast. 

But another, newer part, the Su Mu who had felt Lingxi's touch and seen the open sensuality of Monster City, was undeniably intrigued. 

Still, she couldn't quite shake off the unease that accompanied the unexpected closeness and the boldness of Xu'er's advance.

"Sister Xu'er, I appreciate the gesture, but I think I've got that covered," Su Mu said, her voice a little strained as she gently tried to create some space, to extricate herself from Xu'er's embrace. 

The attempt was feeble; Xu'er's hold was surprisingly strong, yet not painfully so. It was more encompassing than restrictive.

The room suddenly felt much smaller, hotter, and Su Mu's discomfort lingered in the air, mingled with a confusing blush that crept up her neck.

Xu'er didn't respond immediately to Su Mu's attempt to pull away. 

Instead, one of her hands, warm and slender, slid from Su Mu's waist upwards, moving with a slow, deliberate grace over the smooth leather of the corset. 

Su Mu tensed, her breath catching in her throat. 

Xu'er's hand continued its journey until it reached Su Mu's breasts. 

Her fingers, light as a feather, brushed against the swell of her breasts, which were pushed up and prominently displayed by the corset. 

The touch was equally electrifying. 

Xu'er's hand attempted to cup one breast, but due to their generous size, accentuated further by the corset, she could only manage to cover half. 

The contrast between the cool leather and the warmth of Xu'er's palm was startling.

With a questioning, almost wondering tone in her voice, Xu'er leaned in again, her warm breath caressing Su Mu's ear. 

"Tell me," she whispered, her voice laced with genuine curiosity and a hint of that playful tease, "how did you grow such large and well-shaped breasts? Is it a family trait, or are you just blessed by the spirits?"