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!

Eriri: Just a mere Chiba, you want to be a light novel master? Sagiri: Nissan, I'll work hard to become an illustrator worthy of you. Kani Nayuta: I love you so much, senpai! Senjumura Masaru: You're number one in my heart. Kasumigaoka Utaha: Sensei, I'll surpass you! Gokou Ruri: I'm your ultimate apprentice. That day, his journey as a light novelist truly began.

(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."

······

Uzuki Toru is a time traveler, and he also has a wishing machine attached to him.

As long as he fulfills any of the wishes, he will get a random reward. The more wishes he fulfills, the more rewards he gets!

However, these wishes seem a bit strange?

——

"I really want to be Miss Sakayanagi's dog!"

"Bully Karuizawa Megumi in front of everyone!"

"Secretly threaten Sakura Airi, you don't want everyone to know that you are an online idol, right?"

"I want to see Kushida-chan put on a maid outfit with a look of disgust on her face, and then do the maid's service work as if she were looking at garbage..."

The temptation of free tuition and all-inclusive food and accommodation made Miyuki Shirogane resolutely enroll in Tokyo Metropolitan Advanced Nurturing High School.

Following the ordinary genius Arisu Sakayanagi, the wild genius Kouenji, and the artificial genius Ayanokouji, Tokyo Metropolitan Advanced Nurturing High School has added another hard-working genius.

Just before the four geniuses competed on the same stage, a voice from the future appeared in Shirogane's mind.

They claimed to be their future daughters, and their mothers were from four classes in the same grade.

Shirogane: No, how can I compete in the class if you guys do this?

Daughters: Dad, what are you talking about? Don’t you like us? Don’t you want us to be born?

Shirogane: Well, no, it’s because there are so many of you. How can I feed you? Okay, Daddy will work hard for you!

Three years later, I watched the man become the student council president, graduate from Class A, and achieve two small goals in school.

Sakayanagi: This is a hardworking genius. I think this is what I see.

Horikita Suzune: It's really surprising.

Shinomiya Kaguya: No, you are wrong. Only Shirogane who falls in love with someone is the strongest!

Chika: Yes, Shirogane is the strongest when he falls in love with one person, and when he falls in love with many people, his strength is multiplied! He becomes even stronger!

Shinomiya Kaguya: ...Fujiwara-san, shut up!

Traveling through the world of Soman, Nakano Yuu starts with the [Oldest God Killer System], completes the system tasks, gets the number of draws, draws the power of gods and various artifacts!

Just when Nakano Yuu fantasized about hunting down the God of Disobedience and becoming the strongest demon king, he didn't expect that this was actually a weird world where monsters and weirdness coexist? ! !

Fortunately, he got the [Ten Powers of the God of War] and the holy sword Juvayus at the beginning.

Facing five sisters with different personalities, Nakano Yuu originally planned to be the only demon king in the world and enjoy life, but he didn't expect...

The second sister Nino went home from school and was haunted by a cursed female ghost named "Shirai".

Just after rescuing the second sister, classmate Gui Yanye suddenly got involved in a weird story called "Sarumu"!

After finally dealing with the Sarumu, a god of disobedience was suddenly summoned above the school.

After finally dealing with the God of Disobedience, I thought life was like this, but a girl who claimed to be able to see "spirits" suddenly asked him for help.

Looking at the different girls around him, Nakano Yuu was silent.

Is there something wrong here?

After crossing over, Chisato Suzumiya bound a dual system

[Evil Love Simulator], which allowed him to carry out an abnormal love simulation in the simulation life.

"Kasumigaoka, I want to talk to you about Tomoya Aki's violation of school rules."

"Eri, no one would have thought that the idol on campus is actually a otaku painter in private."

"Isshiki Junior, if you want to pursue Hayama, I can give you some advice. Let's go to my house after school to discuss it."

[Pure Love Game] allows him to give the greatest tenderness and help to the opposite sex in real life.

"Happy birthday, Yukinoshita, the limited edition panda Mr. Pan, it's just a little thought, no need to return the gift."

"Don't worry, Pochi-chan, I will be your friend in the future, I will protect you, and no one can force you to do something you don't want to do."

"Touma's piano is the best in the world. No matter what the ranking of the competition and the comments of the judges say, my thoughts have never changed. I have always believed in this." It's great to have two completely opposite systems in simulation and reality that allow him to switch back

and forth between the two mentalities. Today is also a day with split personality.