How I Ended Up with an Extreme Yandere Landmine Beauty When I Asked to Hang Out with My Best Friend's Sister to Get Better at Talking to Girls

Chapter 1: My Best Friend’s Little Sister Has Been Acting a Little Strange

I, Tada Ryoya, have had two close friends since kindergarten.

One is Niijima Shinichi, a tall, cheerful, handsome guy who is always popular in class.

The other is Saito Maki, the talented and beautiful class representative who is very popular with the boys.

Both of them are high-spec, outgoing types who attract attention from guys and girls alike in class.

People often assume that since I am best friends with these two and still get along well with them, I must also be “high-spec.”

But that is a mistake.

Unfortunately, I, Tada Ryoya, am completely ordinary.

My grades and athletic ability are average.

My height and build are average.

As for my face, it is neither particularly good nor bad (or so I like to think).

Even now, in the spring of my second year of high school, I have never been in a romantic relationship with anyone.

In fact, I can barely talk to any girls other than my friend Maki, so I am a typical shy-at-school, unpopular guy.

I have already reached my second year of high school, so I really wish my own romantic “spring” would finally arrive.

But yeah, it probably will not.

“Hey, Ryoya! Mind if I eat lunch over there again today?”

“Want to eat together, Ryoya?”

As I sat at my desk feeling frustrated, the high-spec duo of Shinichi and Maki came over to my seat carrying their lunch boxes.

“Eating at my desk again? I really do not want you spilling stuff on it like last time.”

“Do not be so cold, Ryoya. Come on, Maki kept insisting she wanted to eat at your desk!”

“I did not say anything like that!”

When Shinichi said that half-jokingly, Maki shook her shoulder-length brown hair and denied it, looking annoyed.

The high-spec duo of Shinichi and Maki always tease each other like this right away.

I wish they would save their lovers’ quarrels for somewhere else.

But even though these two are popular, they still hang out with an ordinary guy like me because we have known each other since childhood.

If they had not stayed friends with me, I might have ended up as a lonely, unpopular shadow-dweller by now.

Thanks to having these two as my best friends, I somehow manage to stay around the middle of the class hierarchy.

“Huh? Oh no, I… forgot my chopsticks.”

“What is wrong, Maki? Forget your chopsticks? If you do not mind, you can use some of the spare disposable ones I keep around. They are brand new and still in the wrapper.”

“Yeah. Thanks, Ryoya, that really helps!”

When I handed Maki a new pair of disposable chopsticks, her face lit up with a relieved smile.

“Ryoya really is thoughtful, as always! That is my best friend for you!”

“Yeah, yeah. Then as thanks, why not introduce me to one of those ‘cute girls’ you know?”

“”Huh, girls!?””

The two of them exclaimed in unison, pretending to be shocked.

Oh no!

The thoughts I had been mulling over at my desk before they arrived had slipped out of my mouth.

“The same Ryoya who always acted like a tired protagonist with no interest in romance and sneered at everything—finally interested in girls!”

“Exactly! Wait, Ryoya, do you want a girlfriend?”

Shinichi stood up from his chair in surprise, and Maki frowned.

Both of them seemed genuinely confused.

But since the topic had come up, maybe I should just be honest?

“T-To be honest, I am in my second year of high school now, so I do want a girlfriend… but I cannot talk casually to any girls other than Maki, and I never even get the chance.”

“Y-Yeah, that is true. I have never seen Ryoya being friendly with any girl besides me.”

Just as Maki said, I have never gotten close to any other girl.

Though that might be because I am always with these two high-spec friends.

“I see. So basically, Ryoya wants more chances to talk to girls and quickly get used to them, right?”

“That wording is awful… but yeah, that is pretty much it. I want to get a little more comfortable around girls.”

“All right, then as your best friend, I guess I will have to step up.”

“Huh? You will introduce me to someone?”

“Yeah! I will introduce you to an absolutely adorable girl!”

An absolutely adorable girl…

Shinichi has a wide circle of friends and knows a lot of girls, so my expectations were pretty high.

“Wait, are you sure it is okay to leave this to Shinichi? If you want, I can introduce you to some girls I am close with from other classes. That way I can help out too.”

“No, that would not work. If Ryoya keeps relying on you for everything, it will not do him any good.”

“Relying on me for everything…”

“Anyway! I know the perfect person for Ryoya. So leave it to me.”

“O-Okay.”

Shinichi has been my close friend since kindergarten, after all.

Maybe I should trust him on this.

But… the perfect person for me? Who in the world could that be?

☆☆

I talked to Shinichi about it during lunch, but I never expected him to tell me to go alone to the school gate after class that same day…

Things were moving way too fast, were not they?

She must be a girl Shinichi is really close to.

I headed to the school gate by myself.

But I was the one who asked for help, so now that I had committed, I had to follow through.

I passed through the gate right in front of the shoe lockers—and that was the moment.

“Huh? Ryoya… san?”

Into my view came a high school girl who was a little shorter than me.

She wore the uniform of a nearby prestigious girls’ school, with a light pink knit sweater over it, a gray pleated skirt, and platform loafers.

The sailor collar gave her a nicely modest look, while her long black hair in low twin tails and the pink ribbon at her chest added a touch of deliberate cuteness and sweetness.

“Could you be…?”

Yes—standing there was an incredibly cute girl dressed in a slightly mass-produced “landmine” style uniform.

She really was as cute as Shinichi had said, with an amazing figure—her waist was nicely slim, yet her breasts were surprisingly large (easily twice the size of Maki’s, or so it seemed).

But… hold on a second.

I forced down the male instinct to stare at her breasts first and looked closely at her face instead.

Girls with such long lashes and big eyes were rare.

But this girl… for some reason, she felt familiar.

“Um, you are Tada Ryoya-san, right?”

“Uh, y-yeah.”

“Phew, good! My brother told me there was someone he wanted me to meet, so I came… but I never imagined it would be you, Ryoya-san!”

“Y-Your brother!?”

“Yes! I am Shinichi’s little sister, Niijima Azuri!”

Things had moved so fast because it was that guy’s own sister!!!

What do you mean “perfect for me”! You just called your own sister here!!

“Hehe, I am so happy to see you again♡ Ryoya-san. It has been since that day, has not it♡”