[Slightly hardcore] + [A huge number of self-created academies and students] + [With both angst and sweet moments] + [Daily life/battle]...

Thirty years ago, the Seventeenth Joint Campus was destroyed by an unknown force, turning the once prosperous academy into a desolate ruin. Our forefathers fought desperately during the catastrophe, sacrificing their lives to give their descendants a chance to survive. However, the survivors still wander among the ruins, lost, helpless, and uncertain of the future.

Just as despair was spreading, a firm voice rang out:

"Reconstruction, revival, revenge."

Guided by this brief yet powerful message, the students of Campus 17 wiped away their tears and rose again. They rebuilt their homes from the ruins, unearthing buried scientific discoveries from the depths of the rubble, etching the tragedy into their hearts and transforming past pain into motivation for progress. Beneath the wasteland lies not only a shattered civilization, but also revelations powerful enough to change the future.

Thirty years later, when a similar disaster struck another school known as "Children's Eden," the students of the Seventeenth Campus resolutely raised the blade of revenge. They were no longer helpless survivors, but fighters who had overcome the shadow of death. With thirty years of accumulated experience and the strength forged from the ruins, they would safeguard hope and reverse their fate.

"The past belongs to history, but we remember it."

"What is now ruins, we will rebuild."

"The future belongs to hope, and we create it."

(Note: The main character will talk to himself a lot. Whether you think it's a split personality, not the dual-body concept you're looking for, or something else, just quit if you don't want to read it.)

(I'm too lazy to add anything more. You don't need to go through all that trouble, and I don't need to go through all that trouble explaining. Let's part ways amicably.)

Transmigration, crossover between anime and manga, one soul with two bodies

Each of these words is perfectly normal, but when they are combined...

Yukino Yukinoshita watched our unspoken, perfectly synchronized movements and clenched her hands tightly...

Kaguya Shinomiya stared tremblingly at the photo taken by Ai Hayasaka, in which she was affectionately adjusting my tie...

As Anna watched the two of them expertly exchange lunchboxes, she froze on the spot, having originally intended to join them for lunch...

As Kato Megumi noticed her spot next to her in the club was taken, she slightly turned her head, the glint in her eyes gradually fading...

In response to their questions, the girl with strikingly similar features to me turned around impatiently.

"Ugh, this is so annoying!"

"What do you want to ask? How much do you want to know?"

As she listened to their questions, a provocative smile curled at the corner of her lips.

"I know Mo so well..."

Her voice was deliberately slowed, and she spoke slowly, word by word.

"It's far, far greater than the limits you all could imagine combined, far greater than..."

"—They know exactly how many hairs are on every part of his body!"

(The possibility of adding new members to the project cannot be ruled out)

[A random female protagonist + a changing doll + a loser female protagonist + my little sister + ...]

The moment I close my eyes and open them again, a non-existent memory suddenly appears in my mind.

Rebirth or reincarnation?

Kazama Tetsuya doesn't want to think about those things right now. After his parents' divorce, he became self-destructive and had no source of income.

And those works that popped into my memory are completely absent in this world!

Kazama Tetsuya went completely mad, determined to use the works from his memories to make money and support his family, resulting in: "Saekano: How to Raise a Boring Girlfriend", "My Youth Romantic Comedy Is Wrong As Expected"...

As a result, just three days after submitting the first volume of the light novel, there was a sudden knock on the door of Tetsuya Kazama's house.

Are editors these days so dedicated? They're actually going door-to-door to sign contracts?

...