Turning My Junior Sister into a Mary Sue In Xianxia Yuri World

Thirteen years ago, during the Winter Solstice—

Under a star-studded night sky, a crescent moon hung high at the horizon’s edge. Snow fluttered down like cotton, dressing the mountains in a white coat.

In the side wing of the Hundred Lotus Sect’s auxiliary peak residence, the light in a small room was still on. The window was slightly ajar, and a faint trickling sound of water could be heard if one leaned closer.

Splash—

Xiao Die helped a three-year-old Pei Lengxue into the edge of the bathing tub. But as soon as Pei Lengxue’s left foot touched the water, she pulled it back immediately. Turning to Xiao Die, she pursed her lips pitifully, too timid to speak.

Seeing this reaction, Xiao Die curiously dipped her hand into the water to test the temperature. Sure enough, it was just as Pei Lengxue had indicated—the water was scalding hot, nearly unbearable.

“Hiss… It’s that hot?”

Shocked, Xiao Die furrowed her brows and immediately turned her gaze to the boy on the other side of the tub.

The boy had a chubby face that still bore the traces of infancy. His body hadn’t grown much yet, and if one didn’t notice the distinct feature beneath the water, it would be difficult to tell his gender.

And yet, this four-year-old boy sat calmly with his eyes closed, soaking in the steaming water as though unaffected.

How was he enduring this?

And why hadn’t he said anything earlier?

Xiao Die clicked her tongue in disbelief, letting out a helpless sigh before walking over.

“Hey—Young Master! If it’s too hot, you shouldn’t have gotten in. You jumped in so quickly that I assumed the water was fine!”

As she spoke, Xiao Die grabbed the boy by the shoulder, intending to pull him out of the tub.

“Get out, quickly! If you get scalded, Lady Ye will scold me again. Let me add some cold water first.”

However, Ye Anping grabbed her wrist before she could pull him out. He opened his eyes, shook his head, and said, “It’s fine. The water isn’t boiling; it won’t hurt me.”

“… …” Xiao Die was speechless.

Ye Anping turned his head toward Pei Lengxue, who was nervously clinging to the tub’s edge. He encouraged her, “Junior Sister, why don’t you give it a try? If you endure for ten breaths, you’ll get used to it.”

Hearing this, Pei Lengxue shrank her neck slightly and stared at the steaming bathwater. She swallowed hard, clearly unwilling. But after a moment of hesitation, she bit her lip and prepared to climb in.

“Ah—”

Just as she was about to dip into the water, Xiao Die quickly reached out and pulled her back.

“Lengxue, don’t go in. You said it was too hot earlier!”

“But…”

Pei Lengxue wanted to explain that it was the young master’s order, but before she could finish, Xiao Die interrupted her.

Frowning, Xiao Die turned to Ye Anping and said, “Young Master, if you like torturing yourself, fine, but don’t drag Lengxue into it! Lengxue, just wait. I’ll add some cold water for you first.”

Ye Anping shrugged slightly, offering no further argument.

With a helpless sigh, Xiao Die hurriedly fetched half a bucket of mountain spring water from a nearby cistern and poured it into the tub. After testing the temperature again, she deemed it suitable and helped Pei Lengxue into the bath.

Splash—

Then, Xiao Die retrieved fragrant oils and a cloth, and as Pei Lengxue settled in, she began washing her hair.

“Lengxue, move back a little.”

“Oh…”

Obediently, Pei Lengxue shifted back, lowering her head with an uneasy expression. She appeared tense and apprehensive.

It was her second day in the Hundred Lotus Sect. Whether it was Xiao Die or the boy in front of her, Ye Anping, she wasn’t familiar with them.

All she knew was that Ye Anping was apparently the son of the Sect Master—a young master.

Before Ye Ao took her away from the village, her mother had repeatedly warned her:

“When you arrive at the Hundred Lotus Sect, follow the rules. Never offend anyone. Speak as little as possible, and do whatever they ask of you. Otherwise, if they throw you out, you’ll be taken by the wolves on the mountain. Do you understand?”

As a result, Pei Lengxue was on edge, fearful that any wrong move might displease the young master and lead to her being abandoned to the wolves.

She bit her lip lightly, her large, watery orange eyes darting up and down as she occasionally stole glances at Ye Anping, who sat across from her in the tub.

But then, in her nervousness, she accidentally voiced her thoughts aloud:

“He says something, and I have to do it. Otherwise, I’ll be taken by the wolves… I have to listen to him…”

“Huh?”

Xiao Die, who was washing Pei Lengxue’s hair, heard her murmured words and paused. Noticing the uneasiness on Pei Lengxue’s face and her tense shoulders, Xiao Die thought for a moment before understanding what was going on. She quickly spoke to reassure her:

“Lengxue, you don’t need to be so nervous. Relax. What wolves? Here in the Hundred Lotus Sect, the Sect Master and all the senior brothers and sisters will protect you. How could they let wolves get you?”

“Ah… um, thank you.”

Xiao Die shook her head and added, “Thank you? You’ve just arrived at Hundred Lotus Sect and don’t know much yet. If the weather’s good tomorrow, you should ask the young master sitting across from you to show you around the sect. If you have any questions, just ask him.”

“Okay… I understand.”

Pei Lengxue pursed her lips and nodded. After hesitating for a moment, she looked up at Ye Anping, intending to say something to him. But when she saw his face bearing an expression that seemed to say, “Don’t bother me,” she swallowed her words quietly.

“Gulp…”

“…”

Ye Anping sighed softly, feeling a bit helpless. He opened his eyes and looked at Xiao Die, asking, “Xiao Die, she only arrived at Hundred Lotus Sect yesterday, and you already have her bathing with me. Is that really appropriate?”

Xiao Die furrowed her brows, puzzled.

In her memory, no one had ever explained concepts like “gender differences” to the young master. As far as she knew, he shouldn’t find bathing together with Pei Lengxue strange at all.

Could it be… the young master had secretly read some inappropriate books?

At only four years old? What trouble was this?

Squinting her eyes, Xiao Die decided to test him. “Young Master, why do you think it’s inappropriate?”

“…”

Ye Anping quickly realized he needed to act like a four-year-old child, so he made up an excuse and responded with a furrowed brow: “We’re not familiar with each other. For example, if you had to bathe with a stranger, wouldn’t you feel uncomfortable?”

“Oh, so that’s why…”

Hearing this, Xiao Die’s furrowed brow relaxed, and she let out a breath of relief. Then she said, “Well, think of this as a chance to get familiar with each other. From now on, Lengxue will be your junior sister. As her senior brother, you must take good care of her.”

With that, Xiao Die resumed washing Pei Lengxue’s hair. But as she followed Pei Lengxue’s gaze, a question mark popped into her mind.

?

Pei Lengxue was hugging her knees, her eyes glancing downward and staring intently between Ye Anping’s two short legs submerged in the water…

Xiao Die blinked blankly, then couldn’t help but chuckle. Leaning closer to Pei Lengxue, she whispered, “Pfft—Pei Lengxue, are you curious about why you don’t have that little thing?”

“Ah…” Pei Lengxue hastily averted her gaze but, after hesitating for a moment, nodded honestly. “Mm…”

Ye Anping froze for a long moment before he realized what Xiao Die had said, and a wave of awkwardness washed over him.

But he needed to maintain the persona of a clueless four-year-old, so instead of crossing his legs, he kept his expression blank and childlike, pretending to know nothing.

“…”

Xiao Die ignored Ye Anping and continued explaining to Pei Lengxue.

“You don’t have that little thing because you’re a girl, and Young Master Ye is a boy. That’s why you’re different.”

“Girl… boy…” Pei Lengxue nodded earnestly, her innocent eyes fixed on Xiao Die as if she were soaking in profound wisdom. “Mm, I understand now…”

“As for why you’re different…” Xiao Die tapped her lips, organizing her thoughts. Then her eyes lit up mischievously. “When you come of age, Young Master Ye will demonstrate it for you.”

“?”

Xiao Die chuckled slyly, glancing at Ye Anping’s “little thing” before raising an eyebrow at him and teasing, “Isn’t that right, Young Master?”

?

Ye Anping felt utterly mortified but kept his composure. To maintain the pretense of being a four-year-old, he tilted his head with a blank look and feigned ignorance.

“Mm?”

“Alright~” Xiao Die waved her hand. “Some things will become clear when you both grow up. Young Master, it’s your turn now. Come here, let me wash your hair.”

<+>

“What’s been going on these days? Just a few days ago, the Third Young Mistress was attacked, and now it’s happening again? How did that person get in? What were the senior brothers from the central peak doing during their patrols? How could they let this happen…”

“Who knows? I’ve had this unsettling twitch in my right eyelid recently. Maybe there’s more trouble coming. Let’s keep searching.”

The idle chatter of two men reached her ears, mixed with the sound of water dripping onto stone:

Drip… drip…

Pei Lengxue awoke from her dreams, her mind blank. She opened her eyes to find herself in total darkness. After her eyes adjusted, she realized she was in a pitch-black cave.

The space was narrow, barely the size of a single bed, and surrounded by solid rock walls with no apparent entrance or exit.

Where am I? How did I get here?

Pei Lengxue’s eyes were filled with confusion. As she tried to sit up, she felt an arm draped over her waist, as if someone were gently holding her back.

She turned her head to look behind her.

A handsome young man lay beside her, his eyes closed, his arm lightly resting on her waist. His lips parted and closed rhythmically as he breathed.

Senior Brother…

“…”

At that moment, fragmented memories surged from the depths of her mind.

While bathing with Yun Xi, her senior brother had suddenly arrived, pulling her away to escape from the Shadowmoon Sword Sect disciples. They fled deep into the pine forest.

She had used her spiritual energy to help him suppress his yang energy, but after doing so, she inexplicably felt unwell, as if a wave of heat was churning within her body.

Then, her senior brother had asked her a question and said he wanted to teach her something…

They had done what was depicted in that book, Erotic Art of the Immortal Palace.

Her mind was in chaos, her body limp as she collapsed in her senior brother’s arms…

He had draped his clothes over her and carried her to a rock face. Using a spell, he created a cave and brought her inside to hide…

<+>

So, the thing he wanted to teach me was what was in that little picture book?

Pei Lengxue pursed her lips slightly, confused. But as she recalled the indescribable sensation she had felt at the time, her cheeks and ears began to burn.

She stared at Ye Anping’s sleeping face for an unknown amount of time before snapping back to reality at the thought of the two men’s conversation.

The Shadowmoon Sword Sect disciples are still hunting Senior Brother!

Pei Lengxue tried to get up but found her body too weak to move. Panicked, she leaned close to Ye Anping’s face and called out softly:

“Senior Brother, Senior Brother…”

Using all her strength, she shook Ye Anping’s shoulder. However, he slept like a log and didn’t respond at all.

At that moment, the voices from outside grew clearer on the other side of the rock wall.

—”Senior Brother, does this look like traces of earth manipulation spells? I just glanced at it, and it seems like…”

Thump, thump

Two light knocks echoed, followed by a more serious voice:

—”This part is hollow, Junior Brother! Step back; I’ll try breaking it open with a spell!”

Hearing this, Pei Lengxue felt a sense of foreboding. She instinctively looked at Ye Anping, wanting to ask what to do. But as she gazed at his peaceful sleeping face, her resolve strengthened.

No, I’ve grown up now. Senior Brother is very weak right now; I should be the one protecting him.

Frowning slightly, she murmured to herself, “What should I do… What would Senior Brother do in my place?”

Racking her brain, she noticed the storage bag resting by Ye Anping’s pillow. An idea came to her. She quickly formed a sword gesture with her fingers and retrieved two earth manipulation talismans from his bag. Then she calmed her mind and held her breath, waiting for the right moment.

Boom!

The moment the two men outside shattered the rock wall with a fire spell, Pei Lengxue activated one of the talismans to dig a pit in the opposite direction, resembling a grave. She then used all her strength to roll Ye Anping into it and sealed the pit with the second talisman, leaving only a small breathing hole.

The sound of her earth manipulation overlapped with the blast of the fire spell outside.

Boom!

A second explosion rocked the cave. Dust filled the air as moonlight streamed in.

The two Shadowmoon Sword Sect disciples entered cautiously, their bodies shielded by spiritual energy. Squinting, they peered into the cave.

Seeing only Pei Lengxue lying on the ground, they were stunned and hurried over.

“Martial Aunt Pei?! How are you…”

“…Cough, cough.” Pei Lengxue, choked by the dust, replied weakly, “I’m fine. After escaping from that person, I dug this cave to hide and heal.”

The two men didn’t doubt her. One of them immediately pulled out a pill from his storage bag and handed it to her.

“Martial Aunt Pei, take this to recover. I’ll stand guard for you.”

He then turned to the other disciple.

“Junior Brother, go inform the senior brothers at the central peak that we’ve found Martial Aunt Pei.”

“Yes!”

The other disciple didn’t dare delay and quickly turned to leave. Pei Lengxue, however, thought for a moment. If a Core Formation cultivator came, they might discover her senior brother. She quickly said:

“I’m fine. I’ll return to Xiri Peak after resting a bit. Don’t bother the disciples from the central peak. Have them head south to pursue… That person likely fled south.”

“Understood!!”