You Should Properly Lock the Door When Doing Naughty Things

Ten days had passed since the day my relationship with Iseor noona and Yuna had changed from sex partners to real lovers, and the weekend had arrived. Nothing particularly special had happened during that time. If I had to name one thing, it was that I had returned to university as a second-year student. But if you asked whether my daily life had remained completely unchanged, the answer was obviously no. Now Iseor noona, Yuna, and I could all express our true feelings without worrying about each other. It was such a happy time that I regretted not confessing to both women at the same time from the very beginning, and that happiness was still ongoing.

"Jihoon oppa!"

Yuna threw herself into my arms, hugging me tightly. It was Saturday afternoon. She and I were lying on the bed in my room, just fooling around. While playing with her phone, Yuna would cling to me like this whenever the urge struck her.

"Haaah. Oppa, you smell so good."

"Didn't you say my smell was gross?"

"That was your dick! I've always liked the scent that comes from your body. But after smelling your dick so much, I think I'm starting to like that one too?"

"I see. Since you've smelled my body scent, it's only fair that I get to smell yours too, right?!"

"Kyaa!"

I flipped Yuna, who had been on top of me, onto her back and buried my face in her perky breasts. The scent of her skin soaked into the white tank top felt sweeter than fabric softener. I inhaled deeply, completely enchanted.

"Sniiiff."

"Ahaha, oppa, that tickles!"

"Should I stop?"

"It's fine. It's cute because you look like a little kid, so you can keep doing it."

Now that I had permission, I was about to enjoy the scent to my heart's content when—

"Huh? Oppa, look at that."

It seemed the YouTube video that had been playing had ended and the next one started autoplaying. Seeing Yuna show interest, I grabbed the phone while still lying on top of her.

"Isn't that the lady who owns the house?"

Just as she said, on the screen sat Iseor noona's mother, dressed in a neat suit.

The lady was indeed a sex counselor for women, just as she was introduced in the video. She had once revealed in an interview that she became a single mother at a very young age by accident and went through incredibly difficult times, which led her to start this work to help women going through the same struggles.

"I've ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠heard about it, but this is my first time actually seeing her on something like this. It's so cool."

"I was shocked too the first time I saw her on TV. Iseor noona never mentioned it."

"Iseor unnie? Why would she?"

"Huh? Because that's her mom."

Yuna, who had been wearing a puzzled expression, suddenly sat up in surprise.

"What?! The landlady is her mom? No way!"

"It's true."

"I barely know anyone, and two of them are mother and daughter? Oppa, you're joking, right!"

"I'm not. I wouldn't lie about something like this."

"Umm… I can't believe it. I'm calling unnie!"

Yuna dialed with an expression that said she still couldn't accept it.

Even after the call ended, Yuna still had a smile on her lips.

"Iseor unnie is so cute. Right?"

"Yeah. Her reactions are so good that I keep wanting to tease her."

"…Oppa. But you know…"

Yuna pulled my face, which was still hovering over her, into her arms.

"Unnie said we shouldn't do it too much… but doing it a lot is still okay, right?"

I wasn't sure what the difference between "too much" and "a lot" was, but she didn't give me time to think. Her hand reached down to my crotch.

"Let's do it… just enough so that you can still walk, okay?"

Her cat-like cute face making such a seductive expression only made it more alluring. I was so lost in her eyes that I didn't hear a single sound from the YouTube video that was still playing.

…He's not actually going to get squeezed dry until he can't walk and then take a taxi over, right?

Kang Iseor ended the call with a mix of unnecessary worry and stepped out into the living room. Her mother, Kang Min-ah, was in the kitchen slicing fruit at the dining table.

"What are you doing, Mom? Oh. You're cutting apples."

"Iseor, perfect timing. Take these and eat them."

"Thanks. I'll enjoy them."

Iseor was about to take the plate of apples back to her room when her mother's voice stopped her.

"By the way, Iseor."

"Yeah?"

"Um… you're dating Jihoon, aren't you?"

"What?!"

Iseor's head whipped left and right in panic.

"N-no?! Where did that come from?"

"You go over to his house so often. You're not dating?"

"Why would I date that kid? I've known him since we were little. Seriously, Mom."

"Is that so…?"

Min-ah tilted her head in confusion. Meanwhile, Iseor hadn't moved her feet yet, still standing there. She seemed to hesitate about something before ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠finally speaking carefully.

"…Mom. If I said I really was dating him, how would you feel?"

"Me? I'd welcome it, of course. Where would you find a boy with as good a heart as Jihoon?"

"Really?"

"Of course. I'd be worried about any man who wanted to take my daughter, but with Jihoon, I wouldn't worry at all."

"…."

Iseor fell into thought again. After careful consideration, she spoke once more.

"Actually… I am dating Jihoon."

"Really? That's wonderful. It's hard to find someone as dependable as Jihoon, so treat him well."

"Yeah…"

Iseor's ears turned red with embarrassment. But this time it was Min-ah who fell into a worried expression.

"Um… Iseor."

"Yeah?"

"Is everything okay while you're dating Jihoon?"

"I guess? Nothing in particular?"

‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠

"When you're together at night, or…."

"At night? What do you mean?"

"Ah, it's nothing! Go back to your room. Oh right, I told you I have plans tomorrow and won't be home, didn't I?"

"Yeah, I heard. You're going out with a friend. Have fun."

After the conversation, the daughter went into her room. Kang Min-ah simply stared silently at her daughter's closed door.

After spending a fun time with Yuna and parting ways, I headed to Iseor noona's house at the right time. Since I was supposed to arrive when her broadcast ended, it was now twelve twenty at night. I sent her a message that I had arrived and waited. The front door soon opened.

"C-come in."

Her face was slightly flushed. It was obvious at a glance that she was expecting exactly that kind of thing.

"Is your mom asleep?"

"She's not home. She said she's sleeping over at the jjimjilbang with a friend for the first time in a while."

I had wondered why noona was avoiding naughty things whenever her mother was home, but it turned out there was a reason. We went into her room together, and the moment we got on the bed she burrowed into my arms.

"Sniff, haaah… How many times did you do it with Yuna?"

"Just a normal amount, I think?"

"If you did too much and can't get it up, that's not allowed, okay?"

Maybe because she hadn't been able to do it for the past few days due to her busy schedule, she was already desperate. I felt the same urgency, so I was about to take off my pants when she spoke as if something had occurred to her.

"Oh. I told Mom today that we're dating. She had already noticed… I guess it was really obvious."

"Really? What did she say?"

"She said she'd welcome it if it was you. Thankfully she didn't seem against it."

"Ooh. Then it's basically like we have permission?"

"I guess so…?"

She tried to act indifferent, but the corners of her mouth twitched slightly. She had said she would never tell her mother because it was embarrassing, but now that it was acknowledged, she looked happy.

"Then Mom would understand if we do naughty things?"

"She wouldn't say we can't, but we still shouldn't let her hear. It's embarrassing."

The expectation in Iseor noona's eyes as she answered. To fulfill it, I slowly began taking off her clothes.

What the hell is this…

It was close to two in the morning. Kang Min-ah, who had gotten out of a taxi, walked toward her house. There was a reason she had returned at this hour after going to the jjimjilbang with her friend for the first time in a while. Her friend, who had been chatting with her, received a call from her husband saying something urgent had come up and had to leave. Although it was disappointing, she couldn't do anything about an urgent matter, and it felt awkward to stay at the jjimjilbang alone, so Min-ah ended up leaving too.

I hope whatever it was got resolved well.

With that thought, another worry surfaced as she stood in front of the front door. It was about her daughter's relationship. The truth was, when her daughter told her she was dating Han Jihoon, she had wanted to ask if there were any problems in bed. No matter how she thought about it, she was worried that Han Jihoon's unusually large size would make normal relations difficult. But no matter how close a mother and daughter were, there were still private matters that were hard to talk about. She hadn't been able to ask because she was afraid she was interfering too much.

Maybe I should have asked properly back then…. No, it's not good to pry too deeply. Still….

Having seen many clients who struggled with sex with their husbands or lovers, her worries wouldn't easily go away. With a complicated expression, she entered the passcode and stepped inside the house.

"…."

The living room light was brightly on at two in the morning. Her daughter should have been asleep by now, but she must have forgotten to turn it off. She was about to go turn off the living room light when—

"Hngh, haa…!"

"Iseor noona!"

Moans came from beyond her daughter's door. Kang Min-ah's body froze instantly. She hadn't contacted them about coming home early because she thought her daughter would be asleep, but she never dreamed this kind of situation would occur.

What should I do…?

She was about to quietly go into her own room when the worries about her daughter that she had been carrying in her heart stopped her feet.

Sh-should I check?

If her daughter was forcing herself to accept her boyfriend's demands, then as a mother and as a counseling expert, she couldn't just ignore it. If an unhealthy relationship continued, both the woman and the man could develop mental and physical problems.

If the kids are continuing their relationship in the wrong way, I need to teach them the right way. But….

Now that it came to actually doing it, she hesitated again. No matter how much she was doing it for Jihoon, whom she saw like a son, and her daughter, spying on their private life wasn't right.

Yeah, let's just let it go. …No, what if there really is a problem?

In the end, unable to ignore her concern for the children she cherished, she reached for the doorknob. She carefully turned it, and a small click sounded.

It's not locked…!

Beyond the door, the two people who hadn't noticed continued to let out moans. If she just pushed the door now, she would see the scene with her own eyes. But even at this point, Kang Min-ah was still hesitating. It went without saying that her conscience was pricking her, and this was her first time directly seeing another person's relationship. Moreover, she herself hadn't had any relations even once since the day she got pregnant with her daughter, so her pounding heart wouldn't calm down.

…Yes. This is for Iseor and Jihoon.

The mother, unable to overcome her fear that her precious children might be going down the wrong path, slowly pushed the door open. When she peeked inside, she covered her mouth with her other hand.

"Mmm, ah, haang!"

"You're still leaking so much even after I pounded you like that. Does my bitch's pussy like getting stirred up?!"

"Yes, I like it! Keep stirring up this bitch pussy that's addicted to your cock♡"

I-Iseor…?

Kang Min-ah couldn't hide her shock at the scene before her eyes. Through the small gap in the door, her daughter was accepting the man's thick member while spitting out vulgar words. As if to say her mother's worries were nothing, her face was completely drenched in pleasure.