By Zephyria 
Tae-un, who had been waiting anxiously, was in despair. Why the hell did his height grow so uselessly long, only to still fall short?
“Actually, I slightly lifted my heels when I measured my height before. That’s why it came out a bit taller than I actually am.”
“…….”
“I’m serious, Hyung.”
Facing Kim Si-baek’s narrowed, suspicious gaze, Tae-un rattled off a lie that wouldn’t convince anyone. If he were short by a full centimeter, he would have gritted his teeth and chugged more milk, but being short by a mere 0.3 centimeters was maddening.
As Kim Si-baek’s gaze grew stranger while watching him fret, Tae-un became even more anxious. He failed to realize that the other man’s expression was stiffening only because he was suppressing laughter.
To hide the laughter threatening to burst out, Kim Si-baek covered his mouth with one hand, pretending to be serious as he observed him. Seeing Tae-un—who usually handled everything with shameless composure—now desperately clinging to him while exposing such blatant emotions was, in a sense, truly…
‘…cute.’
Currently, Tae-un had the appearance of someone in his early to mid-twenties. He was at a youthful age where he was lovely just by breathing, and seeing him cling with a restless, anxious look in his eyes made him even cuter.
It would have been fine to keep pretending not to know and tease Tae-un further. While indulging in such mischievous thoughts, Kim Si-baek found Tae-un’s lips particularly eye-catching today as he continued to ramble through an absurd lie about why he thought of faking his height during the measurement.
Perhaps it was because he instinctively felt that Tae-un was now sufficiently an adult.
Not just his height, but his physique had been solidly completed, just as it was before. Despite drinking nothing but milk, his shoulders were broad and his densely packed muscles were strong. The voice of the child, which had been as clear and bright as his ringing laughter, had been colored into a low, resonant bass.
By all accounts, he was definitely an adult. And the fact that Tae-un had become an adult meant…
“…….”
This time, Kim Si-baek’s Adam’s apple bobbed once.
“So, I should be taller than Pi Min-hyeong, right? I figured if I just lifted my heels, it wouldn’t be noticeable…”
Tae-un, who was spouting nonsense that even he found unbelievable, suddenly felt a gaze on his face. When he absentmindedly touched his lips, Kim Si-baek belatedly cleared his throat and turned his head away.
But in that brief moment, Tae-un clearly saw it. A flicker of longing spreading faintly beneath those hazel eyes. He felt something that had been suppressed since the start of puberty—no, since his early childhood—suddenly snap.
“Uh, let’s go outside and talk—”
Feeling embarrassed, Kim Si-baek tried to hurry away, but naturally, he couldn’t finish his sentence. A firm grip seized him and pushed him against the wall, and Tae-un’s face tilted. A humid longing slammed into his lips in an instant.
Perhaps because it had been so long since their last contact, the kiss was rougher than ever. Through the gap of lips parted to speak ambiguously, a thick piece of flesh pushed in relentlessly, instantly ravaging the inside of his mouth and wrapping around the tongue hidden at the bottom.
The aftermath of an action that could be summarized in one line—lips overlapping and tongues intertwining—swept over Kim Si-baek violently. Even though it was just a kiss, his mind drifted far away and his blood raced. The pain in the back of his head from hitting the wall when he was pushed vanished without a trace, overridden by the peripheral pleasure surging through him.
“Hng, mmp. Nng…”
Urgent moans couldn’t even escape as proper sounds and were swallowed back into the mouth. Tae-un greedily took and swallowed everything, as if to steal even the rough breaths leaking between their locked lips. Their tongues, entwined as one, mixed deeply as if they would be crushed, and the large hand holding his jaw slid down to roughly grip the back of his neck.
There was no luxury of catching one’s breath. Though his airway felt dull and blocked due to a lack of oxygen and his chest throbbed, the pleasure sweeping through his entire body starting from his lips was too intense.
When a gap finally opened, air rushed in suddenly. Only then did he realize he had been struggling for breath, and a rough cough broke out. As saliva he couldn’t swallow in time flowed down the side of his lips, Tae-un licked it away like a puppy and kissed his chin with loud smacking sounds.
“Haah…”
His blurred vision finally cleared, and Tae-un came into focus. Though he had attained an adult’s body, he still looked youthful. The dissonance of such a child-like face delivering such a rough kiss was strange.
Tae-un nibbled on Kim Si-baek’s lower lip, which had become flushed and swollen in a short time, and whispered low.
“I think your lip tore a little.”
“Did it…?”
There must have been a taste of blood, but he hadn’t noticed it because he was so focused on the kiss. Kim Si-baek absentmindedly stuck out his tongue to lick the wound, but he ended up lightly touching Tae-un’s lip instead, and as if waiting for that exact moment, Tae-un bit the tip of his tongue with his lip.
This time, it was Kim Si-baek who first pushed his tongue deep to mix. The wound on his lip tore a bit more, and a faint taste of blood lingered.
For a moment, Kim Si-baek thought he was out of his mind. Even the stinging wound on his lip and the metallic taste of blood felt sweet. The pleasure storming inside his mouth heated him up, as if converting everything within into raw, peripheral sensation.
When the tingling pleasure flowed all the way down to his waist, making him stagger unconsciously, Tae-un’s hand caught him. The hand that had been gripping his neck roughly, as if to carve a red mark, was now fumbling at his waist.
As anxious as the tongue that pushed in blindly, the hand brushed against him and slid inside, pulling open the waistband of his training pants.
The hand dove straight into his drawers and gripped his buttocks firmly. Before Kim Si-baek could even react to the sudden contact, he felt a foreign object intrude into his dry hole.
“Ngh…”
The arms wrapped around Tae-un’s shoulders instinctively tightened. Hugging the slightly stiffened waist, Tae-un spread his buttocks. Unlike the fingers that were nibbling at the entrance as if to thrust deep at any moment, his gaze was silently looking down at Kim Si-baek.
The gaze in the silence was by no means quiet. A lust that had not been released—no, a lust greater than that—was crashing violently. Just meeting that gaze made him feel his blood pulsing hotly, and Kim Si-baek found himself panting unconsciously.
Normally, all sorts of thoughts would have swirled in his head. He would have tried to push him away first, citing reasons like it being broad daylight, the study not being a bedroom, or the fact that they hadn’t washed yet, but not now.
Touching this surging longing, Kim Si-baek realized that he had been yearning for this moment more than he had thought alone. Tae-un wasn’t the only one who had been anxious, waiting for the day the shrunken body would become an adult again.
Kim Si-baek closed his eyes and tilted his head back. The back of his head lightly hit the wall. It felt hot, as if the heat had transferred even to the inorganic wall.
Having received silent permission, Tae-un smiled low and took a large bite out of the nape of his neck.
“Since you grew anew from being completely young, Hyung’s cute Un-i is still a virgin, right?”
Does it work like that…? He didn’t have the leisure to speak at length and could only think blankly, but the sound of Tae-un’s laughter vibrated against the skin of his neck.
“Please eat my virginity deliciously. I might be clumsy since it’s my first time, but I’ll work hard.”
Before he could even connect the thought of what kind of nonsense he was talking about now, long fingers—with the hard calluses fully restored—relentlessly pushed through the secret area and inserted. Various thoughts were cut off instantly. Only the nerves, standing on end, responded to the stimulation and occupied Kim Si-baek’s mind.
“Ah-ngh!”
In contrast to the dry entrance, the moist inner walls clung to the fingers with a tacky elasticity, as if welcoming the intrusion. Even though they hadn’t slept together for months, the sensations engraved in the flesh were already being vividly awakened.
Kim Si-baek rubbed his sweat-drenched forehead against Tae-un’s shoulder and clenched his teeth. A feverish moan was chewed between his teeth. One might expect a reunion after so long to be overwhelming, but the hole opened elastically, swallowing Tae-un’s fingers.
Even with just fingers inserted, the heat rose like this; it was hard to believe he had once felt it was strange in the past.
Tae-un pushed his hips forward roughly. Along with the thick texture of the groin rubbing blatantly against him, a hot whisper flowed into his ear.