Su Bai gathered the isotopes from another world, traveled to the world of Soman, and awakened the demon-slaying system.

Demon-slaying? Or membrane-removing?

Only children make choices, but I want both as an adult!

As his strength improved, he soon lived a leisurely life.

Moreover, the journey is still continuing, and he can travel through many worlds.

Yotsuya Miko: "Su Bai-kun, save me!"

Kato Megumi: "I want to be one of Su Bai's heroines!"

Yukinoshita Yukino: "Su Bai-kun, how should I choose between my sister and me?"

Hiratsuka Shizuka: "Who looks better, me or Kirisu Mafuyu?"

Shikagawa Ayame: "I am willing to serve Mr. Su Bai!"

Busujima Saeko: "Su Bai-kun, please give me strength!"

Isayama Yomi: "My heart is yours!"

Gabriel: "Su Bai-kun, do you want to taste the taste of an angel?"

Maruxiel: "Do you want to know the body structure of an elf, Su Bai-kun?" Tokisaki

Kurumi: "Date with me, Su Bai-kun!"

......

So far, the demon-slaying master Su Bai has started an infinite journey in the heavens from his daily life.

As long as you are brave enough, the insect girl will take maternity leave (Undead King).

Can the demons in Demon Slayer: Kimetsu no Yaiba have children? Let Muzan verify it.

Infinite anime, harem, I write books for cute girls in the second dimension.

The heroine is a must! The female supporting role is also necessary! No... this is nothing! It's just basic operations.

The first world is "Gakuen Lonely Island" and "Zoo Idol is Saga".

The second world is "Demon Slayer". The

third is "Undead King" and "The Rising of the Shield Hero".

The fourth is "Goblin Slayer" .

If you have a favorite girl, just say it in the book review. If you miss a girl, please point it out.

Please don't say that I don't break up CPs

"System, can you let me travel back in time?"

"No."

"What about letting me change back to my original appearance?"

"No."

"You can't do this or that, but you can at least help me find a girlfriend, right?"

"No, this system cannot help you find a girlfriend, but it can make you someone else's girlfriend."

"???"

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?