I Want to Eat Your Pancreas - Chapter 8

A mysterious natural phenomenon caused the Earth to be plunged into darkness. The world turned into an endless bloody chaos and mankind is on the brink of extinction…

Going for a swim, she ends up in an ancient wild Beast World and ends up being brought home by a handsome wolf.
She wants to stick to the handsome wolf, stock some salt, farm some land, look at some handsome men and grow old like that, but the handsome wolf pounces on her every day.
What? He wants her to have babies?
NO~ NO~ NO~ There is no happy ending to interspecies marriages, hurry and let go of me handsome wolf~

- Description from Novelupdates

Mechanics fix things.Fighters break ‘em.Those were the two truths Perry lived back on Earth. When he got isekai’d into a young noble with newfound magical powers, he found himself stuck with an awful choice. Try to survive on the Front, the mystical battleground where Hydras and Devils roamed free… Or find another way.So he took an oath. An oath that made him a Magus Dominus. A mage lord. He’d escaped his fate, least for the moment.For most his life, Perry was used to being alone. When he got sucked into Ro'an, he was suddenly thrust into the role of surrogate son to his loyal servant and half-brother to a tempestuous Storm mage. With their help, Perry prepared his best to be lord and protector for his domain. And if he fought a few monsters, and helped a few people along the way, well…Mechanics fix things. And fighters break ‘em.-Progression Fantasy with light LitRPG elements-No romance-Kingdom building and magic progression

[Vest flow, semi-invincible, Conan colleagues]

Interview with the protagonist:

Q1: What is your secret to becoming the ace shark player of the Black Organization?

Jiang Xia: “Take Conan to the target’s house for a walk.”

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Q2: What’s your secret to retrieving the treasures stolen by Kidd many times?

Jiang Xia: “His accomplice is my vest.”

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An interview with the detectives of Kexue World:

Q1: How do you view Jiangxia?

Detectives: “Except for solving the case too quickly + being unable to hold people back, there are no other shortcomings.”

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Q2: As a high school detective, why not join forces with Jiang Xia to fight against the Black Organization?

Detectives (hurriedly wave their hands): “No no no, can’t tell him that the darkness of the world is too heavy for him.”

- Description from novelbuddy