Blue Star World.

Everyone has a chance to awaken the power of a monster.

Jiang Li encountered the awakening of a high-level monster and fell into a life-or-death crisis as soon as he left the game... Fortunately, the system awakened, allowing him to enter various tokusatsu worlds and transform into various monster kings and ultimate knights!

then……

The first generation of Fang Blood Demon King with infinite ultimate moves, the ancient king OOO with infinitely expanding desires, the ultimate Kuuga who brings darkness, Evolto who devours planets, and Oma Zi-O who is destined to destroy the world in the future.

An invincible player who clears levels with cheat codes, the legendary president of Hiden Intelligence, the Holy Lord of Flame who writes a new chapter, the creator who saves the past, and the alchemist of dawn who controls the future.

...

at the same time.

The eccentrics and awakened knights in the real world have begun to possess memories from the dungeon.

Water Maiden Awakener: "My king has finally awakened!" Izu Awakener: "President, I promise I won't resign this time!" Akira Awakener: "Lord Kief, please whip me as you please!"

Woz Awakener: "Celebrate..."

I'm just a person who wants to live a peaceful life. Although I've taught the girls a few new tricks and knowledge, I absolutely haven't instigated them to overthrow the world. Those are all their own ideas. I'm really not the mastermind! ...First up is *A Certain Scientific Railgun*, others to be determined.

Cold, shivering... He opened his eyes, staring at the train moving before him and the roaring monsters outside. Lin Shi, who initially thought he'd just transmigrated into a slice-of-life anime world, was somewhat unable to hold back. Luckily, as a transmigrator, he had a built-in cheat code! This isn't random—wait, why is the game starting to display garbled text? (...An infinite flow anime crossover, but the player is a two-dimensional character!)

On the battlefield, the Avengers were locked in a fierce battle. Just as Thanos was about to win, suddenly, a loud bang was heard in the sky, and a huge warship that blotted out the sun appeared above everyone's heads. A man stepped out of the open hatch of the warship.

Who are you?!

Thanos sensed unease and shouted loudly.

"You ask who I am?"

The man had an air of arrogance and disdain for the world.

"Listen up, I am the Doctor of Rhodes Island, the Admiral of the Naval Base, the Master of Chaldea, the Commander of Griffin, the Onmyoji of Heian-kyo, the Knight of Princess Connect, the Dress-Up Master of Miracle Continent, the Operator of Rainbow Squad, the Commander of Punishing: Gray Raven, the Duelist of Duel City, the Crying Demon Hunter, the Demon Hunter who collects Gwent cards, the Ash Without Fire, the Ash Lord of the Fire Keeper, the Outer God Exterminator. The one who cuts down the undead. The Dragonborn of Skyrim, the God of War who slaughtered the gods of Olympia and Asgard. The Assassin who has nothing and does whatever he wants, the cop of Raccoon City, the ruler and protector of the Borderlands, the King of Elden, the Highlord of Azeroth, the Warrior of Arad, the Summoner of Valoran, the Defender of Crossfire, the Mercenary of Kohan..."

A virtual reality game based on the Warhammer Universe, boasting a high degree of freedom and incorporating multiple well-known IPs, has become a viral sensation online. Dutch, drawn by its popularity, has also become a player. Little does he know, the game has just begun, and he has already been transported to the real Warhammer Universe, becoming the sole player. Guilliman: Dutch is an excellent warrior, but he doesn't like to listen to people. Every time I give him a mission, he skips it. Talassien: I'm curious how he manages to break stars into blocks. Tau: For that guy, physics doesn't exist. Khorne: That bastard built a giant pillar, saying he'd use it to break me. Nurgle: He kidnapped my children, washed them clean, and that humiliation fills me with grief and anger. Tzeentch: All changes are part of destiny, but that bastard shattered destiny. Slaanesh: Actually, I've already corrupted Dutch, but I dare not tell him. ...Dutch: Forgot the beginning, forgot the end, anyway, let the warp burn. Emperor: Support, 666.

Fatti, transmigrated to the world of DanMachi, starts with a fully-equipped arsenal of three magic spells and seven skills. Unfortunately, his potential is extremely limited, preventing him from seeing further. It's only after accidentally discovering a hidden treasure chest function that his life takes a dramatic turn. He opens invitations to recruit familiars from other worlds, acquiring various magic books and transforming himself from a mage into a noble sorcerer. With the goddess Demeter as his backer, he secretly accumulates strength, manages his familiar, and quietly develops his power. From then on, he cautiously and steadily begins his fantastical life in this other world.

A proficiency certificate that lasts forever! A system that allows me to traverse countless worlds! I lack nothing now! In Dr. Stone, the Sword God of Ten Mile Slope, the Wilderness Gourmet, I took my first extraordinary step to save a lost civilization. In One-Punch Man, he extended an invitation to unemployed office workers: "Want to become a savior hero?" In the Biohazard world, a man and a panda roam the apocalypse: "Dragon Warrior? Savior Hero!" In Ling Cage, Battle Through the Heavens, and Mortal's Journey... step by step, he has come a long way, and in countless worlds, everyone praises him as the supreme and holy savior. But only Lin Hao knows that all of this is due to his own hard work and sweat! System! Proficiency! Give me 1000% support!

(Multiple female leads + slow-paced development + occasional lighthearted and humorous slice-of-life scenes)

(This book is also known as: Is Yingmei really me?!, I'm playing Genshin Impact?, Everyone in Teyvat! Lend me your power!)

I am Su Bai, the transmigrator who traveled to Teyvat and was surrounded by beauties. Even my slovenly blonde aunt Yingmei is me!

Furthermore, it awakened the Genshin Impact game system, allowing it to become stronger by deeply participating in Teyvat events and making wishes to obtain rewards!

Holding countless intertwined fates in their hands, Su Bai and Ying Mei looked at the female characters from the game and smiled kindly at each other.

Su Bai: Ying, I have a preliminary idea.

Ying: Su Bai, me too. Forget the flight attendants, the ladies are the real focus of my journey!

Good news, I was killed by a train at home.

Even better news: he's become the navigator of the train.

Even better news is that you can travel to the world of anime by train.

What pioneering and interesting things did you do after becoming a navigator?

She was paired with Kirito.

Adopting Lolis from All Over the World

Discussing the relationship between monarch and subjects with a famous queen

The birth of the king was celebrated with a cannon salute; God was lured onto a train; and Shiori almost fell in love with him.

Do these count?

Worlds experienced: Sword Art Online, Black Bullet, Akame ga Kill!, Date A Live, High School DxD, Guilty Crown, Academy Battle, Accel World...

(P.S.: The world-building is mostly from older anime series, with fewer newer ones.)