Yandere and Menhera - Suddenly Having a Yandere Older Stepsister and a Menhera Younger Stepsister Makes Every Day Difficult

As I was changing into my uniform the following day, Ririka ran up to me with her backpack on.

“Good morning, Onii-chan!”

“Yeah.”

“You seem down. What’s wrong?”

“Your guys’…”

I choked on my words.

“No, just feeling a bit sick.”

“Is that so. Take it easy and rest, okay?”

After saying that, Ririka left the scene, opened the front door, and energetically headed to school. As I was about to follow her out the door, Matsuri-nee-san grabbed my sleeve and flashed me a sly smile.

“Hey, Onii-chan.”

“Hey.”

“Yes…”

“Don’t you want to do something nice?”

“Something nice?”

“Yeah.”

“…No, I’m good.”

“Okay. Whenever you feel like it, just let me know.”

I had no idea what Matsuri-nee-san meant by “something nice,” but I felt terrible about it. With a sense of unease, I headed to school.

Even after entering the class, I didn’t speak to anyone but focused on the lessons. Sitting in the back seat by the window, I mused that it was the perfect spot for someone like me when an oddly interested kid spoke to me.

“Hey, are you free?”

“…Not really.”

“Why so cold?”

“…”

“Hey, hey.”

“Annoying.”

“…Hmm. Hehe. See you later.”

“…What?”

I felt a vibe from this kid that was similar to Ririka, similar to Matsuri-nee-san, yet different from both of them.

Hoping that my premonition was wrong and a misunderstanding, I continued to face my classes in solitude.

◆　◇　◆

The tedious, low-level classes continue. During lunch break and mealtime, I finish eating without exchanging words with anyone. The math class after lunch is incredibly sleep-inducing. Fighting off drowsiness, I finish the rest of the classes and, around 4 pm, it’s finally after school.

Just as I was about to leave the classroom with my things, the girl who had spoken to me earlier blocked the door.

“Hey, hey, leaving already?”

“You’re in the way.”

“Why are you so irritable and snappy?”

“…Can you hear?”

“I won’t move unless you answer my question!”

This level of annoyance seemed to require a significant amount of leveling up to achieve. Deciding to completely ignore her, I tried to reach for the door through the gap between her torso and arm, but she tightened her grip.

“…I want to go home, okay?”

“Then answer the question?”

“Sigh, what?”

“Why are you so irritable and snappy?”

“I don’t need to answer you. There, I answered your question. Now move.”

“…You weren’t like this in elementary school.”

“Did you say something?”

“Nope. Alright, I’ll move.”

She swiftly moved aside, allowing me to rush to the entrance and leave the school. Even though hell awaited me at home, I just wanted to return to my room and sleep as soon as possible. That was my sole focus as I ran home.

I arrive home. Opening the front door.

Matsuri-nee-san stands towering before me, then says,

“Did you talk to a girl today? You smell strongly of a girl.”

“Just some annoying person was there. Didn’t really talk.”

“Is that so. Then it’s fine.”

“Besides, it’s none of your business, nee-san.”

“…Eh, is that so?”

☆☆☆

“Hey, Azumin!”

“What’s up?”

“What were you talking to that boy about?”

“It’s a secret~!”