Family Trip feat. Boyfriend (Heat Induction)
“Whoa, I didn’t know there was a place like this tucked away in the mountains.”
Dad looked around and spoke with a voice full of admiration. Just as he said, a dazzling glass structure stood proudly amid the dense mountains like a glittering castle. It was the Onyang Hot Spring Spa World.
“It’s awfully quiet, though. Are they even open?” Mom tilted her head in confusion.
“Yes. This place doesn’t accept regular customers.”
The senior who had followed them up answered. Both of his hands were occupied with suitcases—he had volunteered to carry the parents’ luggage. Jieun, who knew the true motive behind his excessive kindness, had desperately tried to stop him, but in the end the bags ended up in his grasp.
“It doesn’t accept regular customers?”
“It’s members-only. Only VVIP clients of the company that runs this facility can use it. Even then, you have to make a reservation in advance.”
“Wow… VVIP, like at a department store?” Mom asked, eyes wide with surprise at the senior’s explanation.
“Something like that.”
The senior grinned.
“This feels… a little too extravagant for us.”
Dad scratched the back of his head with an uncomfortable expression.
“You should’ve just refused, then.”
Jieun spoke with genuine feeling. The reason they had come here today was because the senior had suddenly shown up at their house with the suggestion. How about we all go to the spa together during the holiday? The parents had looked visibly flustered by the abrupt proposal. Jieun had been just as shocked.
Not only had he barged in unannounced, but he had also brought up something like that. Jieun had immediately dragged the senior into the bathroom to confront him.
“You said you wouldn’t touch my family if we went on a date instead!”
He had replied with perfect composure, feigning innocence.
“I only came to suggest we all go to the spa together. It’s not like I’m pressuring you because you rejected my date offer.”
“You fraud! Liar! You said that if I accepted your favor, you’d be bound by it too and couldn’t break it—was that all a lie?”
“You seem to be misunderstanding something. The promise I made in the car that day—not to touch your parents in exchange for a date—had nothing to do with any favor. That was a transaction. And transactions can be broken at any time. You’re far too naive, Jieun.”
The senior patted her shoulder lightly as he spoke, then casually walked past her and out of the bathroom. In the meantime, Jia had already finished persuading their parents by begging and throwing a tantrum to go. And so the five of them—Jieun, Jia, their parents, and the senior—had ended up at this luxurious spa built in a remote countryside village for their holiday.
The senior went inside first, presenting his ID and VVIP membership card at the reception desk for verification. Once the process was complete, he guided them to the rooms.
“I’ve booked two rooms. Five people in one room would feel a bit cramped, so Jieun and I will take this one, and Jia and the two of you can take the other. If anything feels uncomfortable or you don’t like it, just let me know and I’ll switch the rooms.”
“No, this is already more than enough.”
Dad waved his hands dismissively.
“By the way, you two sharing a room… Our future son-in-law is very well-prepared, isn’t he? Still, you know speeding is off-limits, right?”
Mom teased with a mischievous smile.
“Of course, ma’am. Jieun’s personality wouldn’t allow it even if I asked.”
Liar.
He had already done far more than speeding—he had made illegal U-turns. How rotten could his conscience be that he could say something like that without even blinking?
Jieun placed a hand on her hip and thought. Even after all this time, she still sometimes felt an unpleasant sensation whenever she went to the bathroom.
“True. Our daughter is a bit conservative. Sometimes she acts older than I do.”
“Ah, I thought the same thing. I guess everyone sees it the same way.”
Jia chimed in, glancing at them with a sly look. Jieun felt a twinge of irritation, but it wasn’t Jia’s fault. It was all because that wicked man was manipulating her sister’s mind at will. Her little sister was nothing more than a puppet dancing to the senior’s tune, bound by invisible strings.
“I’ll put the luggage in the rooms. Feel free to look around and rest. I’ll come get you when it’s time.”
“Got it. Thanks, future son-in-law.”
Mom waved her hand.
“Shall we head over there?”
The senior guided them to the room he had reserved separately. The moment Jieun stepped inside, an involuntary gasp escaped her. It was the kind of room you only saw in movies. The entire space was decorated with solid wood and granite. The wooden sections felt soft, while the stone parts were rough yet comforting. Floor-to-ceiling windows lined the edges, offering a clear view of the mountain valley beyond. The vast, lush greenery felt unfamiliar yet strangely peaceful to Jieun, who had lived in the city all her life.
If this had truly been a quiet family trip, she might have lost herself in the scenery for an entire day. If only that worst possible man weren’t standing right beside her.
In the center of the room stood a large, luxurious wooden table and chairs, while one corner featured a stone enclosure with a small pond surrounded by greenery.
“Nice, right? I prefer places with this kind of atmosphere over unnecessarily flashy ones.”
The senior approached from behind and casually draped an arm around her shoulder. In the past, she would have immediately brushed it off, but lately her body no longer allowed her to do so. Was this also because of the accumulated favor? The thought made her uneasy, as if she were being slowly devoured.
“…Stop wasting time and just tell me what you want, senior.”
Jieun glared at him, her voice sharp.
“What I want? Nothing in particular. I just wanted to spend some quiet time with you, so I brought you here. You wouldn’t have come if I’d just asked, would you?”
The senior spoke as if reminding her that she had been the one to reject the date.
“So you’re saying you won’t do anything violent like you did at the motel last time?”
“Hmm. That depends on how you behave. If you keep making me uncomfortable here, I might get rough. I’m usually a gentleman, but when I’m angry, I’m not.”
As expected, this man had planned this from the very beginning. Strangely, knowing everything outright made her feel calmer.
“…Trash.”
“You sure that’s okay? Badmouthing your boyfriend like that.”
Of course it wasn’t okay. Just uttering that single word had already put a tremendous strain on her body. Cold sweat was dripping down her back.
“It’s a girlfriend’s duty to tell the truth, senior.”
Yet Jieun forced herself to retort as casually as possible.
“You know what? That’s exactly the kind of thing that makes me even more obsessed with you.”
The senior leaned in close and whispered.
After finishing unpacking, they moved to the restaurant for lunch. The meal was served outdoors with a clear view of the mountains. The dishes featured bulgogi hotpot and vegetable wraps made with local mushrooms. Mom, Dad, and Jia praised the food enthusiastically, but Jieun couldn’t taste anything. It had been like this ever since that day’s date. She wondered if something had gone wrong with her sense of taste—nothing she ate had any flavor. So this meal was just another ordeal.
After lunch, they began using the spa facilities in earnest.
“There’s a swimming pool over there, and it looks like you can get massages there. That’s the sauna area. They have several different types.”
Jia spoke excitedly. Jieun headed to the open-air hot spring and immersed herself in the water.
“Why do you look so gloomy? Was the food bad?”
The senior appeared beside her and sat down, asking the question. Because of you. Jieun shot back sharply in her mind. Of course, she couldn’t say it out loud—doing so would bring severe repercussions.
“Remember what I said at the motel last time?”
The senior sat so close their faces nearly touched and whispered into her ear.
“…What are you talking about?”
“That if I wanted to, I could even control your menstrual cycle. You didn’t believe me back then, did you?”
He had said that. It was something she couldn’t accept—didn’t want to accept.
“Want me to show you this time?”
“You don’t have to, senior.”
Jieun forced a smile and tried to stop him. But the senior didn’t stop, continuing to whisper into her ear.
“From now on, your mind will be filled with nothing but the desire to have sex. Your thoughts will be completely consumed by the urge to have your pussy stuffed with cock—you won’t be able to think about anything else. The pleasure you felt from the sex we had before will keep resurfacing in your mind, making you crave being roughly fucked over and over again.”

“Ugh…!”
The moment she heard those words, a hot wave of heat spread through her body. Her nipples stiffened instantly, poking against the towel draped over her. Every time the rough fabric brushed against them, her aroused body twitched in response.
“Ah…?”
Just now, Jieun had felt it. Deep inside, her most sensitive spot—her weakness—had finished preparing. Preparing to receive this man’s seed, to conceive, to create new life in a different form.
His words had been true. He could even manipulate her ovulation cycle. If this man’s seed were to be released inside her now, she would get pregnant with 100% certainty. Jieun instinctively knew it.
“How is it? It works, right?”
The senior said, sliding his hand between her legs. Jieun couldn’t refuse or deny it. His hand moved lower and lower until it reached her clitoris, which stood erect as if begging to be touched.
“Hahk?!”
Jieun let out a startled cry reflexively. She looked around anxiously, worried someone might have heard. Sensing her thoughts, the senior spoke.
“Don’t worry. I had Jia take your parents somewhere far away.”
“‘Took them away’…”
The crude phrasing made her feel a bitter self-reproach for the momentary relief she felt upon hearing it.
“Come up here.”
The senior patted his lap with his palm.
“N-no…!”
Jieun desperately refused.
“It’s an order. Or would you rather I put it in?”
“Ugh…!”
Her parents were here. So she had no choice but to obey this man. It can’t be helped, she muttered to herself as an excuse, then stood up and sat on Kang-hyuk’s lap. As she did, he shifted his hips, causing his fully erect, burning cock to press firmly against her sensitive, swollen labia.
“Haaang♥”
Jieun let out a lewd sigh, her face melting with pleasure.