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.

Transmigrating to a vast anime world, Luo Yi starts with a system of epithets, complete with a succubus epithet. He initially thought he'd be destined for a life of luxury, but unexpectedly extracts a Saitama epithet. When he comes to his senses, he finds himself surrounded by a brutal love triangle… Artoria {Alter}: The tyrant's appetite is huge! Master, you're not leaving this room tonight. Sakurajima Mai: Just you wait! Tonight, I won't lose to you again! Freya: What a terrifying sight! Perhaps we could discuss magic in my room? Esdeath: I met this guy first! None of you are getting rid of him!

[Slice of life across various anime series, multiple heroines, gradual romance, not mindless gameplay]

Taki Aragaki also likes rainy days, and the same rainy weather rewards him with different precious things, but it seems that there is more than one such precious thing.

So you're from the future?

Looking at the somewhat childish handwriting on the paper, he just found it a little funny. He guessed it was a joke played by the child who couldn't find his way home. But it wasn't until the other person clearly stated his information that he believed that perhaps his life had really undergone some incredible changes.

"So should I just follow what's going to happen in the future?"

"But besides that, it seems there are other things I need to take care of..."

Looking at the timid blonde loli in front of him, the boy thought to himself.

One day in the future, the history of the knights is scattered by someone with ulterior motives. To destroy the knights' existence, they disperse the watch face representing that history across various worlds. With each watch activated, that piece of knightly history begins to erode that world, ultimately erasing it at the cost of an entire world. Meanwhile, a mysterious young man named Kadoya arrives in Shuchiin. What is his true identity? His mission to collect knightly history across 38 worlds is nearing completion, and he will soon find the meaning of his journey.

Currently in the world: Fate (Rider Rush+). When the Holy Grail War in Fuyuki City unexpectedly intertwines with the Knight War in the Mirror World, an unusual Holy Grail War of fourteen knights in a chaotic battle quietly begins. Magicians and Kamen Riders, Contract Beasts and Servants, the Mirror World and the real world—the originally parallel laws collide here, bringing chaos and miracles.

Kamen Rider + Fate + Oregairu + Date A Live + Kaguya-sama: Love Is War + My Favorite + Ellie-chan... and so on and so forth.