Also known as "We Can Be Adventurers Without All the Hassle" & "Is Turning the Adventurer's Guild into an Online Game Company a Wrong Thing?" In the opulent throne room of the Great Tomb of Nazarick, Ainz Ooal Gown sits high atop his throne, overlooking the crowd of cat-like players below. Cat Ferry: Look, meow! This is the protector of the Great Tomb of Tsuwu, the ruler of the fortress city of E-Rantel, the Supreme Being of the Great Tomb of Nazarick, the mayor of your Novice Village! The invincible Ainz Ooal Gown, the great Sorcerer King Ainz Ooal Gown! Why don't you all bow down and pay your respects, meow?

Upon waking, Nobita finds himself sixty years behind in technology. In the town of Tsukimidai, all memories of Doraemon vanish along with the regressed era. After a series of twists and turns, Nobita and his friends learn the truth: an unprecedented, massive, and trans-temporal war is unfolding, its target the future where humanity's technology is booming. The dominoes hidden in the past have already fallen, about to form a colossal wave that will engulf every era of humanity. The only clue is a snapshot taken across time. On September 19, 1492, at the center of the temporal vortex, the Time Police captured a photograph of the back of a blue nursing cat-shaped robot. This becomes the catalyst for Nobita and his friends being drawn into this trans-temporal heist. As they uncover more and more clues across different eras, a massive conspiracy gradually surfaces.

[Slice of Life, Harem, Heartwarming, Funny] Louis, a little boy who fell from the sky. Ship girls, a group of lonely, infighting girls, but when the ship girls met Louis, the port already had a commander. As the only commander in the port, Louis's daily life is busy and bittersweet. The ship girls steal his clothes, rob him of his food, and even beat him up in alleyways. Every time, Louis gets sucked dry by the ship girls; anyone who doesn't know better would think they're vampires. "White Dragon, give me back my bitter tea!" "Frederick the Great, don't come any closer!" Today, Louis is still being driven crazy by the ship girls...

Yuuji Sakai, the usually vacant and somewhat weak protagonist, lives an ordinary life until the sudden appearance of a monster disrupts his ordinary life. Under the setting sun, Yuuji is suddenly attacked by an alien monster that transforms human "existence" into spiritual fire and then devours it.

At this time, a girl who called herself "Flame-haired and Burning-eyed Slayer" appeared and rescued Yuuji from the monster's mouth. Yuuji Sakai named her Shana based on the name of her large sword.

She told Yuji that his life was about to end - it turned out that outside this world, there was another world called the "Red World". In order to realize their ambitions, the people there took away the world's original power, the "power of existence", from humans one after another, and Yuji was one of the victims.

After the Crimson Apostle took away the "Power of Existence",...

[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."

[Time travel + second playthrough] [Loli] [Yandere] [Multiple heroines] [Minor intellectual battles + math and physics]

The world has restarted, but you lost your memories. Will you become the protagonist of the story?

————

All living beings on the Tianyuan Continent possess three souls, from which three cultivation paths have emerged: body refinement, qi refinement, and soul refinement.

Xu Lin, who died and traveled through time, did not have three souls and seven spirits. He had to let the ghost lady Mochi reside in his body, pretending to be his soul, thus being resurrected as a half-human, half-spirit.

His otherworldly adventures then veered towards an absurd and bizarre style.

Xie Si, a little girl who was bought to be buried with her husband in a ghost marriage and is now in utter despair?

A sickly, delusional childhood friend who feeds false memories to her feigned amnesia and is full of lies?

A foster father who searches far and wide for books from Earth and develops religion, economy, and technology in another world?

Laplace the fairy, an otherworldly escapee who impersonates a system?

Xue Miaomiao, a catgirl who works as a hunter from another world in a brothel?

A half-human, half-demon daughter from the future, living in mourning?

Even more so, there are those who want to refine themselves into spirits and stay with their past life lovers for life?

...

While gradually repairing his battered life through adventure, Xu Lin uncovers the secrets of the Tianyuan Continent and its immortals and gods.

Shocking! The Tianyuan Continent is flat! There's another world on the other side!

They were all fooled by Him! The Three Lives Stone was actually fossilized dung from a real dragon!

Is this what they're doing, restarting the world?

...

This world has long been riddled with holes by the local immortals and gods who are obsessed with entertainment and the foreign demons who have distorted the laws. Should Xu Lin, who knows everything, save this world that is on the verge of collapse?

Is it that what they can do, I cannot?