The Closed-Off Space

"Then I'll be going first," Mikoto said.

"Yes. Good night."

Mikoto left, leaving Imouto behind.

"—Miss Index, would you like me to walk you home? Misaka complained silently in her heart about her older sister dumping her work on Imouto while talking to Index."

With Mikoto gone, Imouto was naturally the one left behind.

[You're actually making that kind of snarky comment? 233]

[Give us more of the Sisters' storyline! I want to see all twenty thousand Sisters!]

[The key is that all twenty thousand of those Sisters are also huge.]

[Absolutely amazing!]

[I get the feeling something big is coming. What exactly is going on with Endymion?]

[I want to see slice-of-life stuff, I want slice-of-life stuff!]

[This really feels like an utterly unpredictable Stage of Destiny.]

[Beginning: ordinary school life. Ending: saving the world. Lol.]

Early the next morning, Accelerator was awakened by a phone call from Nunotaba Shinobu.

"What is it? It's so early." Accelerator lay motionless in bed.

"Elisa, as ARISA, is going to hold a concert," Nunotaba Shinobu said, then specifically emphasized, "A solo concert."

"...Huh?!"

Accelerator was instantly wide awake.

Although their first "debut performance" had fallen through, the three-person group still technically existed.

"What about The First One?" Accelerator asked again.

"I haven't been able to contact her for now."

Things seemed to be getting more and more troublesome.

Closed Space

"Then, let's begin."

"Mm."

Although the Performance Outfit was embarrassing, it was fine if it was for a performance.

"Then, let's begin."

The girl stepped onto the stage.

Kamijou Touma and Index were beneath the stage at that moment.

"ARISA is great and all, but where are MISAKA and Accelerator?"

"Could the rumors that those two are Level 5s actually be true?"

"Hahaha, how could that kind of urban legend be real?"