In crossover anime, who isn't a childhood friend?

"It's a long story. In short, to prevent her from continuing to suspect anything and to avoid causing trouble for Chiyo, I'll just say I'm going to stay overnight at Yukino's house whenever I come here from now on."

"You've had it tough too..."

While the two were chatting, Eriri had already chosen a floral print nightgown.

Eriri had prepared her own underwear for the previous visit; she bought new ones while shopping with Rikka. After washing and feeling them, she put them in Rikka's closet, which is convenient now.

The two walked into the bathroom together and soaked in the bathtub together. The moment they entered the water, they both let out a long sigh of relief.

They chatted casually about family matters, school matters, and topics related to the ongoing comic book series...

As they chatted, Eriri gradually noticed that Rikka's gaze... was somewhat strange, constantly lingering around her.

Since they were both girls, Eriri didn't feel offended at all.

But the problem is that Rikka's gaze today seems to have a very... aggressive quality!

Yes! It's offensive!

That gaze seemed to pierce through her skin, as if trying to see into something more hidden within her, making her exceptionally uneasy.

Just as Eriri was timidly about to raise her arms to her chest, intending to say that she had finished soaking and was going to take a shower, Rikka suddenly said in a low voice, "Eriri, have you... gotten a lot bigger lately?"

Ok?

So you were just staring at it to confirm this?

Eriri couldn't help but laugh when she heard this, and immediately turned her embarrassment into joy. Although she turned her face to the side, she proudly puffed out her chest!

"I really can't help it, you found out about this."

"Huh? I was right? I thought it was just the refraction of water."

"It's not a reflection effect!" Eriri exclaimed anxiously, immediately kneeling up in the bathtub and holding it up to show: "You'll understand when you see it, and I have indeed changed all my underwear to a size larger recently."

"..."

Rikka watched, her gaze complex.

Eriri coughed lightly and sat down again.

"So, this should all be thanks to my older brother."

"Probably, but I think it's also related to my consistent consumption of milk."

Liu Hua condensed her cat-like eyes: "But you've been drinking milk for so many years, and I haven't seen any results after all these years."

"Who said that! It does have some effect! It's just... not very noticeable!"

"Whether it's you or my brother, I'm not an outsider, so you don't need to be so shy around me."

"This has nothing to do with being shy..."

Eriri said in a very low voice, then submerged her mouth below the surface of the water and started blowing bubbles. She didn't say anything more, which seemed to indicate that she agreed.

Rikka blinked, leaned closer, and poked her shoulder: "Um, Eriri..."

Eriri turned to look at her.

Rikka's throat bobbed: "...So, what's it like between you and my brother... and Chiya... in private?"

"!—Cough, cough cough—!" Eriri choked on her own: "Idiot Rikka, what are you saying?!"

Rikka knew that her question seemed too direct, but even so, she tried her best to remain calm and used the excuse she had prepared from the beginning: "I'm just... just curious. We're such good friends, can't you even tell me?"

"It's not that it's impossible... but this topic is too strange!"

"I don't believe you and Yukino haven't discussed these things in private!"

"It's obvious, given Yukino's personality, how could we possibly talk about something like this! As for Rikka, well, you were definitely just trying to make fun of me and embarrass me!"

"What? I didn't mean that at all. I'm just really curious... I want to know... the specifics... of what happened between you two..."

Rikka's face was now so red it could bleed; in order to lower Eriri's guard, she was even willing to get involved herself.

Tong: "Okay! I confess!"

"Hmph, I knew it."

“Actually… I’ve fallen for a boy now, just like Eriri…” Rikka looked away.

Eriri perked up immediately upon hearing this, her earlier embarrassment vanishing, and she completely missed the subtle change in her expression: "Eh! Who is it? Is it someone from our school? Did they confess to you? Or did you take a liking to someone else?"

"Don't ask so many questions! I haven't even figured out what to do myself yet!"

"What's there to think about? Our Rikka is so cute, if you like her, just do it! No one can resist your charm! I guarantee it!"

What's the point of your promise? Besides, if only it were that simple...

"Let's not talk about that for now. Anyway... that's why I wanted to learn from you, Eriri. It's also a way to... learn in advance so that if I encounter a similar situation later, I won't be like an idiot who doesn't know anything."

"I see..."

When Eriri heard Rikka say this, she didn't seem as resistant as before to explaining her private interactions with Chiya.

But she quickly realized what was going on, and her sense of responsibility and friendship as a sister-in-law kicked in: "Rikka, you're not asking all this because you want to take things to the very end, are you? No, no, absolutely not! It's okay to like someone, and it's okay to be together, but it can't be that casual!"

"Who would be so casual! I didn't mean that at all; I just wanted to find out!"

"Really?"

"Really, really!"

"Hmm...that's more like it."

"Well... Eriri, it's about time you answered my question in detail."

"..."

Eriri's legs were pressed tightly together beneath the water's surface. She hesitated for a moment, then gently rubbed them together, but finally nodded: "Just ask me whatever you want to know... as long as it doesn't involve anything too private, it's fine... but one thing, whatever you do, don't tell Chiya!"

"Of course I won't tell him, or anyone else. It's a little secret between the two of us~"

Eriri felt a little relieved: "Then go ahead and ask."

"So, the first question... you and Qianye... after it started... were you really comfortable?"

"..." Eriri blushed, and after a long while, she slowly nodded under Rikka's gaze.

"This is how it is from the very first time?"

"...Hmm...It's the first time...it's a little uncomfortable, but...Chiya is very gentle with me, so it's okay."

"So from now on... will it be the same as the comics you used to draw...?"

"It's not that exaggerated... but it is indeed... very addictive..."

“So this place where you grew…” Rikka pointed, “was definitely because of Chiya…”

"Hmm... with his hands, but not just with his hands... In short, he always pays special attention to me in various ways..."

"At that time... Eriri, how did you feel... how did you feel... how were you feeling..."

"Hmm...as for the feeling...it's tingly and numb...and my mood...is naturally very good...it's that indescribable feeling of floating on air..."

Eriri thought this was really weird!

Discussing such private topics with your lover's sister!

But the conversation had already progressed this far, and Rikka did indeed have her own reasons. Moreover, since she was being called "sister-in-law," it seemed to be her duty to clarify some common sense for her.

With this in mind, the conversation between the best friends and sister-in-law continued in the bathroom.

…………

261: My sister-in-law witnessed it!

Eriri never expected that the first person to give her such a strong, indescribable feeling tonight would not be Chiya, but Rikka!

Although she had a clear reason, the questions she asked were just too... too outrageous and unconventional!

At first, she was quite restrained, either omitting some words or stammering and vaguely mentioning them, and the two of them could understand the meaning without saying a word.

But as time went on, Rikka seemed to have opened the door to a new world. Her cheeks were rosy, but her eyes were exceptionally focused and bright, and she became increasingly unrestrained.

The questions raised included, for example, "How many times do you guys... actually do it each time?" "Do you really feel as comfortable as the heroines in your old manga/doujinshi when you're at the end?" "So, what exactly does that most comfortable moment feel like?"...

Eriri's body was burning hot just listening to it, and she covered her face tightly throughout her answer.

The process was so humiliating that it made you clench your toes and wish you could just die on the spot!

But thankfully it's finally over.

While Rikka was silently savoring the moment with her wet eyes downcast, Eriri quickly climbed out of the bathtub, rinsed herself off at lightning speed, and left with the words, "I'm going back to my room now, you can soak for a while," before making her disappear!

Back in her room, she remained restless for a long time, pacing back and forth.

My body was so hot that even opening all the windows didn't help much, and I even wanted to turn on the air conditioner!

That's outrageous! Absolutely outrageous!

I was talking about intimate things in bed with my boyfriend's sister...

She didn't think about the incident in much detail when it happened.

But now, after calming down a bit, she belatedly realized that something was very wrong!

This is too lewd and chaotic! This is absolutely too lewd and chaotic!

At the same time, Eriri also admired Rikka's thick skin; she was actually able to ask so many private questions about her brother without batting an eye, all while remaining completely unfazed.

If it were me... just imagining it makes me incredibly embarrassed, after all, he's my blood brother!

Oh, right, Rikka and Chiya are from a blended family; they are not actually related by blood.

Even so, they are still brothers and sisters!

Is that girl too innocent or too carefree?

No, no, this is the only time. If this happens again, I absolutely cannot let her lead me by the nose!

No matter how curious she is about that topic, let her go directly to Saeko-nee. Anyway, I can't take it a second time.

Eriri, amidst her confused thoughts, sensed something and cautiously approached the door, peering outside.

There was no movement. Chiya should still be training in the living room, and Rikka should still be in the bathroom.

She quickly locked the door from the inside, then drew the curtains, pulled out some tissues, and went to the bedside.