In the new era, the city I live in is known as the safest place in the world... because I, who had become a demon, was caught.

Many young girls have heard an urban legend:

Legend has it that at a certain crossroads, there exists a pawn shop called No. 0, whose owner is a demon.

The devil will favor beautiful girls, granting their desires and tempting them to fall.

...

"Mr. Su Yun, what do you think of the comments above?" asked Eriri, the "loser," holding the microphone.

"Well..." Su Yun smiled slightly and put the clown mask on Eriri's face. "Is it possible that this isn't just a rumor?"

[Apocalypse + Heroine + Natural Disaster + System + Superpowers + Building Power] A crossover anime world, apocalyptic rewards. Xia Yu awakens a heroine encyclopedia system; collecting heroines makes him stronger. While others starve, Xia Yu feasts on delicacies every day. While others struggle to survive, Xia Yu is surrounded by heroines. [Yukino Yukinoshita: Evil Xia-kun, is this imprisonment game fun?] [Saya Takagi: You bastard, I don't like this feeling!] [Eriri: Baka! I, I don't like you!] [Chizuru Shiina: I've already turned into Xia-kun's shape!] ...

I was thrown into countless hentai worlds, forced to walk the path of scum to survive. I seduced married women with the fragility of a young boy, coerced girls with my blond hair, or engaged in forbidden school romances as a teacher… Now I have a new identity: the evil spirit of Babel, the doctor of Rhodes Island… the harem king of Terra. I will use the abilities of the underworld to change this land filled with tragedy. I was once a quality inspector at Type-Moon Heavy Industries, and I conquered the world in the name of Lance; those powers came with me. “Believe me, my becoming a harem king is all the world’s fault!” “I will save this damned world! To undo those regrets!” “Come, witness me as a player, as the Fourth Calamity!” [Erotic and exciting, five chapters a day, quality guaranteed, plenty to satisfy]

[Characters appearing include characters from Honkai Impact 3rd, Star Iron, Grand Blue, Oregairu, Kaguya-sama: Love Is War, and Saekano... as well as some heroines whose origins are unclear. I won't cite their sources; those who like these series will understand.]

Don't worry, it's not some cuckolded turtle.

He transmigrated into a world primarily based on Detective Conan, a fusion of various anime and manga. He was also linked to a yoga studio; after each yoga class, he could draw cards to win all sorts of treasures! The studio owner would receive a hundredfold return! So, Lin Mufeng went on a killing spree! Lin Mufeng: If you behave well, I might consider letting you draw an extra card. Eri Kisaki: Can yoga make my tongue more flexible? Ran Mouri: Why did you close the yoga studio when you and my mom did it? Sonoko Suzuki: If you let me practice yoga, I'm willing to give you all my money, and even myself! Vermouth: Don't talk, come in! Yukiko Kudo: Can I wear black stockings for stretching? Ai Haibara: Will my flexibility really increase after I transform? ...Watching one familiar face after another lining up to come to the yoga studio, Chen Mo fell into deep thought. Who should he take to yoga today?

[Multiple female leads + crossover anime + apocalypse + raising/raising a child + otherworld]

Good news, we've traveled through time!

Bad news, it's the end of the world.

Good news, I have my own system.

The bad news is, it's a dating system.

"You want me to fall in love in a world where a packet of instant noodles can do anything? Is it that your communication skills are flawed, or is it that my comprehension skills are flawed?"

This is the story of an ordinary person who transmigrates to a post-apocalyptic Japan, only to acquire a uniquely styled romance system, and incidentally, slay some Japanese devils.

(This story is rather hardcore; those who dislike this genre or have a strong aversion to such content should not read it. The author expresses gratitude in this regard.)

(Harem! Harem! Harem! I've repeated it three times, please just take a look.) Question: What's the specialty of Izu? Answer: Flammable oolong tea! To overcome his fear of the sea, Hachiman Hikigaya came to the coastal city of Izu to attend university. He thought that with his solitary personality, he would only spend four years peacefully, but unexpectedly, he encountered many strange people. Kitahara Iori pointed at the pink-haired guitar girl and the decadent JD next to him, incredulous: "You actually have so many female friends?" After learning about his experience, Imamura Kohei covered his head and shouted: "And you also have a high school harem club that used to belong to you, and a super cute little sister even calls you Onii-chan?" "Scumbag! God punish you!!!" x2 Today is still very peaceful. [Grand Blue + Lonely Rock + Dark JK, maybe a bit of a transformation, anyway, I'll sew and sew, I'll write whatever comes to mind (˵¯͒〰¯͒˵)]

You reap what you sow; you repay what you help. Wandering through the economically declining Tokyo, surrounded by countless compassionate souls awaiting a helping hand, Akiyama decides to follow his heart and become a helpful 'good person'.

My name is Fujiwara Seiji, a transmigrator. What I love most isn't saving the world, but admiring the helpless yet beautiful sight of those arrogant heroines falling into the abyss. When the black-stockinged upperclassman, Kasumigaoka Utaha, took off her stockings in front of me for three million yen in surgery fees. When the blonde loser, Eriri, knelt down begging me to invest in her dreams. When the icy beauty, Yukinoshita, walked into my room to rebel against her family. Only then did I realize how interesting this world truly is. Hero? Savior? No, I just want to be a… behind-the-scenes mastermind who controls the heroines. [Friendly Reminder: The protagonist of this book is loyal to his own desires; those with a saintly heart should avoid this!]