Nobody knows why. Nobody knows how.
Yet somehow… several worlds have become entangled.
It always starts the same way.
A mysterious red button.
One press.
And suddenly heroes, villains, generals, shut ins, spirits, and undead overlords alike find themselves ripped from their respective worlds and dropped into a perfectly ordinary looking classroom.
A double isekai. Because once was not enough.
By now, the chaos had settled into routine.
The classroom buzzed with overlapping conversations, complaints, and thinly veiled threats.
Kazuma: "Unbelievable… I escape one fantasy world and I still have to deal with school mornings?"
He slumped in his chair dramatically.
Darkness: "If anything, this environment is far less punishing than our usual battles…"
Her cheeks flushed. "Though I would not object to harsher discipline."
Kazuma: "Please don’t encourage that."
From across the room, a small, chilling voice cut in.
Tanya: "If someone is struggling with discipline… I would be delighted to implement a corrective schedule."
Her smile was razor sharp. A clipboard snapped shut with military finality.
Kazuma sat upright instantly.
Kazuma: "I’m awake. Extremely awake. Never been more awake in my life."
A loud laugh burst from beside him.
Aqua: "Pfft! You’re such a coward, Kazuma! Look at you, scared of a tiny girl!"
Kazuma: deadpan "You cry when frogs chase you."
Aqua: "THOSE WERE LARGE TOADS, A TRAUMATIC EXPERIENCE!"
On the other side of the classroom, skeletal fingers tapped thoughtfully against a desk.
Ainz: "Hm. At least this world lacks the constant threat of annihilation."
Albedo: "As long as I am by your side, my Lord Ainz, no world could possibly end~"
Ainz silently reconsidered everything that had led to this point.
At the front, the flamboyant figure of their homeroom teacher spread his arms wide.
Roswaal: "Settle doooown, everyone~ We have a veeeery special transfer student today."
The room quieted. Curiosity replaced chaos.
A hand suddenly raised at the front.
Emilia: "Roswaal-sama? If someone new is coming, we should welcome them properly, right?"
She stood with determined grace. "As class representative, I’ll make sure they feel included!"
Subaru: "That’s my Emilia-tan! Compassion level maxed out as always!"
Ram: "Barusu, sit down."
Beatrice: "Honestly. You’re exhausting, I suppose."
Subaru deflated instantly. Rem gently patted his shoulder while Puck floated nearby, nodding in agreement.
Rem: "Well, well. If Subaru and Lady Emilia wish for it, then it can't be helped."
It had appeared without explanation.
No label. No warning. Just a bright, inviting red.
Curiosity won. You pressed it.
The ground vanished.
Gravity seemed to hesitate, then changed its mind. The world flipped like a page in a book, and before you could fully process what was happening, you found yourself standing in front of a classroom.
You were not alone.
Roswaal: "Everyone~ Welcome our neeeew student."
Rows of unfamiliar faces turned toward you.
A knight in gleaming armor. A skeletal overlord in regal robes. A silver haired half elf. A military officer with far too sharp a smile. A blue haired goddess already whispering something dramatic.
Roswaal: "Would you kindly introduce yoooourself?"
All eyes locked onto you.
The room waited. What do you do?