"Then will you write what's really on your mind in it?", Hikari asked again.
"This… sometimes, I guess…", Suiren's pretty face flushed slightly as she gave a vague answer.
It seemed she didn't really want to discuss this topic with Hikari, so Suiren changed the subject, pretending she hadn't just seen Aoi come downstairs, and asked, "By the way, Hikari-kun, wasn't Aoi studying with you in your room? Where did she go?"
Hikari honestly relayed, "Aoi said she bought a very moist, very sweet lipstick a few days ago, and then blamed me for eating all her lipstick just now. She said she's going to bring that lipstick up and put it on, then let me taste it."
"Uh…", Hearing Hikari describe it so bluntly, Suiren couldn't help feeling a bit awkward, half of her face turning red.
Still, she pretended not to quite understand and asked, "Hikari, do you mean… you were… kissing just now?"
Hikari nodded honestly, "Yeah. Aoi said she wanted to learn something called a French wet kiss. I happen to know a thing or two, so I taught her."
"No… no… didn't you say you were going to study together? How can studying include that kind of thing…", Suiren's whole face had turned red now. She looked at Hikari, shy and awkward.
"It was Aoi who said she wanted to learn it. I figured it counts as a practical skill, so I taught her," Hikari said with an innocent expression.
"Oh come on, you two are still students. How can you be learning this kind of messy stuff!", Suiren scolded him softly, her face red.
But because her tone was too gentle and soft, it didn't sound scary at all. Instead, it almost sounded like a roundabout way of acting cute, making one's heart itch when hearing it.
Seeing the gentle Suiren with that anxious yet helplessly cute look on her pretty face, Hikari couldn't help feeling a bit mischievous and asked,
"How is kissing some kind of messy thing? Suiren-nee, haven't you learned it before?"
In Japan, quite a few young people see being inexperienced as something shameful, to the point that it's become a kind of trend.
So when faced with questioning from a junior younger than herself, Suiren, who actually had no experience at all, still couldn't help blushing and putting on a brave front.
"H-how could your big sister not have learned it? I'm older than both of you, so my experience is naturally much richer than yours!"
"I see…"
Seeing Suiren already nervously twisting her small hands together without realizing it, her earlobes red with embarrassment, how could Hikari not guess the truth.
He smiled, just about to speak again.
But Suiren spoke first, "Alright, alright, stop prying into your sister's business. Back to you two. Hikari, you and Aoi are still just h!gh sch0ol students."
"Do you really think it's good for you to always be hugging each other like this, and… and kissing and nibbling like that?"
"At your age, you should keep some distance. Even if you truly have feelings for each other, you should wait until after you graduate and start working before taking things further, shouldn't you?"
Though her tone was still gentle like flowing water, once she got serious, Suiren looked at Hikari with a very earnest expression.
Hearing her advice, Hikari said helplessly, "Suiren-nee, actually I know that right now we should focus on our studies. But you know Aoi's personality. Every time I teach her halfway through, she takes the initiative to cling to me."
"All the things you're telling me, I've already told her too. But the more I say, the more excited she gets, the tighter she clings to me. She even threatens that if I keep talking, she'll go even further, so I'm really helpless."
Hearing this, Suiren cursed inwardly, 'Helpless my ass, you're clearly enjoying it!'
Even though she felt embarrassed, seeing Hikari look like he was being forced into it and unable to change Aoi, Suiren still felt anxious.
She couldn't help raising her voice a little, "Hikari-kun, you absolutely have to keep proper distance from Aoi. You can't have an overly intimate relationship anymore. You have to know that you're both still h!gh sch0ol students. You really can't bear that kind of responsibility."
"I—"
"Oh my, why is Suiren-nee in my room?", Before Hikari could finish responding, someone interrupted him.
The two turned their heads and saw Aoi, her lips painted with an alluring bean-paste-colored lipstick, walking gracefully into the room.
"Suiren-nee, what secret talk are you having with Hikari-kun behind my back?", Aoi asked with a smile.
"N-no, nothing," Suiren, who had actually sneaked in earlier, now felt the awkwardness of being caught red-handed like a thief.
"And Hikari-kun, you too. I don't mind that you liked my sister before. But now that you're officially dating me, you can't get so close to my sister anymore, okay?"
"Being alone together in a room, a guy and a girl, is even more no-no, okay~", Aoi stood between Hikari and Suiren, smiling sweetly as she spoke.
Hikari smiled back at her, while Suiren wore a helpless expression and didn't continue the topic she'd been advising Hikari about earlier.
As a sister who lived with her day in and day out, Suiren understood Aoi's rebellious personality to some extent.
She knew that the more you told her not to do something, the more she'd want to do it.
So trying to advise her in front of Hikari really wasn't a good idea. If she really opened her mouth, Aoi might actually dare to kiss Hikari right in front of her.
"Nee-san, I still need to study with Hikari-kun. You should go out first and stop disturbing us~"
Before Suiren could think of what to say, she was smilingly chased out of the room by Aoi.
After being pushed into the hallway, Suiren hadn't even had time to leave.
Very soon, those strange sounds that made her face burn came drifting out of the room again.
"Just how far have those two gone? They didn't really do it already, did they?"
Thinking this, Suiren couldn't help feeling anxious.
But this time the door was shut pretty tightly, leaving her anxious with no good way to do anything.
Just as her heart was already pounding, her thighs unconsciously rubbing together a few times, feeling like things were getting dangerous, and she was considering whether to force the door open, the door suddenly opened again.
This time, it was Hikari who came out.
"Suiren-nee?", Seeing Suiren standing at the door with her pretty face flushed, two red clouds floating on her fair cheeks, Hikari looked at her in confusion.
"Uh… I was just about to come call you to eat dessert. The strawberry crepes are ready. If you want some, Hikari, you can go eat them."
Facing Hikari, Suiren felt unbearably awkward. Her face was burning red, her skirt hem a little damp. She wished she could crawl into a crack in the ground, but in the end she still found a reasonable excuse to brush him off.
"Oh, I see. Thanks, Suiren-nee. I'll go use the bathroom first."
What made Suiren sigh in relief was that Hikari didn't seem suspicious at all and just went downstairs.
Watching Hikari's back as he went downstairs, Suiren took a deep breath, then pushed open the door and walked back into Aoi's room.
She saw Aoi half leaning against the headboard, her body looking a bit limp and weak.
The flush on her face was no lighter than Surien's. The lipstick that had looked quite heavy earlier was now so faded it was almost invisible.
There were a few hickeys on her neck, and her sailor uniform was in a bit of a mess.
Suiren couldn't help sighing.
Hearing the movement, Aoi hurriedly sat up straight from the bed.
"Nee-san?", Aoi looked at Suiren with the embarrassed expression of someone caught red-handed.
"What were you two doing?", Suiren stared into Aoi's eyes and asked seriously.
"N-nothing… we weren't doing anything. We were just… just studying!", Aoi replied, sounding a bit guilty.
Suiren immediately pressed, "Studying? Really studying?"
"Aoi, your sister really has to warn you. You absolutely cannot progress too fast with Hikari. It's not that I don't trust Hikari, it's that you're both still too young."
"At your age, kissing and hugging is one thing. But at the very least, you absolutely can't do that. Otherwise, if you mess up and your belly gets big, you'll both be finished…"
Hearing this, Aoi said with a troubled look, "Actually, I know all that in my heart too. But I really like Hikari-kun so much. I really can't refuse any of his requests, and I always want to stick close to him."
"And Hikari-kun is also at that age. Nee-san should know what boys that age are like. They can even poke through steel plates."
"I… I don't know if Hikari-kun can control himself either. If he really wants it, I really can't bring myself to refuse the request of the person I like…"
Aoi stared at Suiren with her big eyes, looking completely innocent.
Hearing all this, Suiren was full of helplessness as well.
She was very worried that Hikari and Aoi, being in that ignorant youthful phase, might end up doing something they'd both regret.
If anything serious really happened and hurt either of them, Suiren, who cared for them like a big sister, wouldn't be able to accept it.
So Suiren had already decided earlier to stop them and had made a rough plan.
She planned to first reason with one of them, analyze the pros and cons, and then have them control their distance and not do anything that truly crossed the line.
But what left Suiren speechless was that she talked to both Hikari and Aoi separately.
And both of them said it was the other who took the initiative.
And that he or she only passively agreed, forced by circumstances.
In this situation, Suiren really couldn't tell which one was lying.
And there was no way to ask further.
Because no matter what, judging by their current situation, as long as one of them suggested breaking through that line, the other wouldn't refuse.
So even though she already knew they might cross the line at any time, Suiren was truly anxious and worried, yet completely at a loss.
"Before Mother left, she told me to take good care of Aoi. As her older sister, I really should look after her. I can't let the two of them keep making mistakes.'
'And Mother has been very busy lately. I can't let Hikari-kun and Aoi's situation bother her anymore.'
Thinking of her mother's tired eyes, Suiren felt the weight of responsibility on her shoulders grow heavier.
Then thinking that both her younger sister Aoi and Hikari, her childhood friend, were extremely important and irreplaceable people in her life, Suiren became even more determined not to let them go astray.
'No. As the older sister who's older than both Hikari-kun and Aoi, I can't let them keep making mistakes. I absolutely have to do something!'
Suiren clenched her small fists and silently made up her mind.
Not long after Suiren made her decision, Hikari, having finished using the bathroom downstairs, returned upstairs.
But not long after he entered Aoi's room, just as the two had hugged each other and started nibbling, studying certain biology knowledge, the door was opened again.
"Aoi, Hikari-kun, time for snacks. Big sister just baked strawberry crepes!"
Ignoring Aoi's awkward look, Suiren smiled as she set the strawberry crepes in front of them, even thoughtfully grabbing one and stuffing it into Hikari's mouth.
Seeing Suiren standing there waiting to collect the plates, Aoi had no choice but to pull Hikari along and finish eating the crepes.
After they finished, Suiren finally picked up the plate and left the room.
Aoi became lively again and planned to continue studying knowledge with Hikari.
However, just as Hikari had measured her bust size halfway, Suiren came in again, this time carrying two cups of tea.
"Oh my, studying is hard work, huh. Hikari-kun, Aoi, come try the tea your sister brewed. I personally roasted the tea leaves myself. Super fragrant, right?"
As if she didn't see Hikari measuring Aoi's bust, waist, and hips, Suiren cheerfully introduced her tea.
Under Suiren's fixed gaze, Hikari and Aoi could only obediently drink the tea slowly.
Like this, Suiren didn't say much, but she was basically openly keeping watch on them.
As long as there was the slightest inappropriate movement, she would find an excuse to come in and directly interrupt them.
This made Aoi extremely uncomfortable, and Hikari, who always liked getting to the bottom of things, also felt quite uneasy.
"Nee-san, you're really disturbing our studying like this!"
"If you keep coming in and out like this, I'm going to lock the door!"
Aoi finally couldn't take it anymore and directly laid it out with Suiren.
"Uh…", These words made Suiren freeze on the spot. She had just come in with fruit as an excuse.
Seeing both Aoi and Hikari staring at her with not-so-friendly looks, Suiren realized that what she was doing really was pretty annoying.
"Alright, I won't disturb your studying anymore. If you need anything, just call me."
In the end, Suiren lightly bit her lip and withdrew from the room.
She even proactively closed the door.
"Hoo…"
Seeing Suiren finally close the door, Aoi pounced into Hikari's arms and let out a sigh of relief.
———
At the same time, Suiren, who had closed the door, also let out a big sigh.
To be honest, she wasn't the only one feeling uncomfortable when she kept interrupting Hikari and Aoi like that. Facing their gazes, she herself felt uncomfortable too.
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