Travel through a world invaded by disasters and awaken the sign-in system of all worlds.

He thought that signing in in this world and obtaining the power of a Ruler of Reason, which was enough for him to protect himself, would be great enough.

Unexpectedly, he was selected by the dimensional chat group and got the opportunity to sign in to other worlds!

[Ding! Congratulations to the host for signing in to the Genshin World and gaining the allegiance of the Heavenly Principle and the Four Shadows of Heaven.]

[Ding! Congratulations to the host for signing in to Demon Slayer World and obtaining the perfect version of the immortal body, which cannot be erased by non-rule levels.]

[Ding! Congratulations to the host...]

Sign in to all realms, strengthen yourself, establish destiny and reverse entropy in the gradually collapsing world.

I originally wanted to head towards the end of the trees and the sea, but I found that I met countless beauties in the process.

Kasumi no Shi: "Tsk, what an unlovable leader!"

"You left a deep impression by being a hero saving a beautiful girl, but now you want to just walk away after you've been seduced?"

Eriri: "Damn it! I was here first, and the twin tails were supposed to increase attack speed! Why don't you come up and attack!"

Esdeath: "This man is stronger than me. I can't match him in terms of strength, but I must conquer him in other aspects!"

Lei Movie: "He saved his sister, if he wanted to..."

………

(Comprehensive anime + multiple heroines + plagiarism, Oregairu, The Heroine of Nowhere, Kaguya-sama: Love is War, Lonely Rock, I Can See, Kashi-sama, Can’t Study Together, The Quintessential Quintuplets...)

What should I do if I travel through time and space and become a fat otaku?

Masao Tanaka was extremely desperate. He had traveled through time. It would have been fine if his name and family were strangers, and it would have been fine if he hadn't been given a handsome face.

But why did he become a typical fat otaku like someone from an anime?

Fortunately, there is a system, but why is this system called the [Degenerate System]?

······

Yukinoshita Yukino: "It's really uncomfortable to be with Tanaka Jun."

Ying Lili: "You are a guy whose head is full of pornographic garbage. Come up with a new plot for me!"

Kasumigaoka Utaha: "I never thought that the person who wrote such a sweet novel would be you, Fat Otaku."

Yotsuya Miko: "Tanaka, help me, just destroy the evil spirits and let me..."

Fujiwara Chika: "Tanaka is really cute."

Goto Ichiri: "Tanaka, best friend."

······

After traveling to the world of anime, Hikage Miyauchi obtained a magical diary. As long as he wrote in it every day, he would get rewards.

But he had read diary online before traveling, and he knew that what he wrote would most likely be seen by the heroines of this world.

As a salted fish with no ambition, Hikage Miyauchi immediately decided to be a pure fun person in this world.

"What era is it? Who still writes traditional diaries?"

"No one is really willing to write their true feelings in a diary and then be watched by countless heroines, right?"

"My mother told me that this world is very dangerous. Boys must protect their privacy when they go out, so don't think about coming to me. After all, I am a man you will never get."

As Hikage Miyauchi continued to write in his diary, an "Avengers Alliance" composed of heroines who could see Hikage Miyauchi's diary was quietly born.

They gathered together for only one purpose, that is, to find the owner of this diary and ravage him inhumanely!

After traveling to the world of a manga, the first place he encountered was a devil high school, and he was reincarnated as a disciple of the Himejima family whose parents had both passed away.

However, the system did not awaken until the age of twelve, and at the beginning he obtained the embryonic bloodline of the Sun God Winged Dragon, until the story began when he was sixteen.

Kill one hundred lower-level monsters to get elite weapon drawing tickets as rewards, and obtain the magic sword - Phoenix Blade!

Kill 100 mid-level monsters to get an epic weapon draw ticket and obtain the Sword in the Stone!

Kill one hundred high-level monsters to get legendary weapon draw tickets and the king's treasure!

Kill a demon-level creature and get a reward... a maid draw ticket?

I have obtained the legacy of a mysterious multiverse-level civilization, and can travel to countless anime worlds.

So what to do next? For passion and excitement? To meet beautiful girls? To save the world from doomsday? Or fight for all that is good? Or is it about establishing a super organization that spans countless worlds? What are you thinking? Only children make choices. As an adult, of course I want them all. Take them all!

When Aoki Hiroshi found himself transmigrated into a seemingly ordinary anime crossover world—only to discover his "cheat ability" was the infamous Gene Lock—he could only sigh in exasperation.

Fortunately, fate granted him a multiverse-traveling power, allowing him to hop between supernatural worlds and accumulate their powers. Meanwhile, his "normal" world began its own spiritual awakening…

—

—

Yotsuya Miko: "So many evil spirits… Thank goodness Aoki-kun is here!"

Sawamura Eriri: "Wait—I have King Arthur’s bloodline?! And King Arthur was a WOMAN?!"

Senjougahara Hitagi: "You solved my problem like a hero. Is it so strange to fall for you, Aoki-kun?"

Tsuchimiya Tōko: "To think someone in this era could rival the gods… It’s an honor to meet you, Lord Aoki."

Traveling through the world of immortal cultivation, a new sign-in system has been added, allowing you to become a demon cultivator. Sign in to the "Yin Yang Yu Huang Yu Da Yu Jue" (The Great Jade Art of Controlling the Phoenix) to seek out a woman of destiny, share your destiny, and plunder the essence of the world. Just where can I find a woman of destiny? The Zongman chat group has arrived. Aren't the heroines of Zongman worlds the women of destiny? Isn't the Zongman world all about resources? Sign in to the world of Sifangchuan Acorus to gain entries and begin plundering them. Slaughter Kabane to refine your blood essence and sharpen your magic blade. In the world of Black Beast, clear monsters and collect heroines to refine your destiny. In the world of Kasumigaoka Utaha, control humans and cultivate supernatural powers. Zongman protagonists refine elixirs, plant demon seeds, and refine celestial demons. Ten Thousand Souls Banner, White Bone Demon Armor, Great Devil Freedom, Seven Saints of the Mysterious Heaven, and Seven Non-celestial Demons. …………… Within the world of immortal cultivation, an age-old demon quietly rises. Under the guise of exorcism and defense, those on the right side of the path launch a demon-slaying convention. But everyone looked at the demon's treasure of merit and the golden wheel of merit on his head. Which demon's merit was greater than that of the righteous?

Shiraishi traveled to the world of soongan, where there are characters such as Yukinoshita Yukino, Yotsuya Miko, Eriri, Shinomiya Kaguya, etc., and also awakened the career panel. He attended classes and studied hard, awakened the "student" career, and his grades improved by leaps and bounds. By participating in the school's home economics and cooking class, he can unlock the "chef" career. ... Each career can make Shiraishi grow stronger by gaining experience. He met the transfer student Yotsuya Miko and unlocked the extraordinary career "Forced Exorcist"! Encountered Bloody Mary at the beginning. As a forced exorcist in Lisha, facing Bloody Mary (female imp loli), he had to use special means to force exorcism... Later, he even joined the dimensional chat room and began to evolve extraordinary. Entering the world of Suqing, he started the career of "Grand Mage" and killed gods in the world of God Slayer, starting a new career "God Slayer"... Unknowingly, Shiraishi has become a multi-level existence, overwhelming the heavens and all worlds.

Shen Bai travels through the world of anime and becomes the trainer of the heroine.

By capturing and "training" the heroine through physical connection, it can be a win-win situation.

Yuki Suho: Brother, human training and the like should have been arranged for me a long time ago.

Kato Megumi: Shiro, I also want to be noticed, please train me quickly.

Yotsuya Miko: Mystic Death Eyes, I have evolved the Mystic Death Eyes, don't move, let me do it.

Hell's Blizzard: Training, huh, I'm not obsessed with you, I just want to catch up with my sister, come behind me quickly.

Others capture elves, but Shen Bai captures the heroines. When Shen Bairi ravishes three thousand women, he ascends to heaven in broad daylight, obliterating the avenues of the world.

Flashing graves. Just after crossing over to a new world, it was destroyed, leaving Su Ye as its last human. Luckily, a chat group arrived, and upon signing in for the first time, he was given a 'Cocoon of the End', forever binding himself to this world. The stronger the civilization, the greater its power. But... there are no humans left in this world. So, my friends in the group, are you planning to immigrate? Free houses, land, and superpowers! You don't want the cursed child? Take it!