Villain: Ultimate Mutation System in the Alternate World - Chapter 510: Peak of the World Part 2

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

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume

In the new era when the earth began the test to become a Level 2 Civilization, everyone's Constellations played the most important role because only from them could people obtain skills.Having a contract with a stronger Constellation meant getting skills with a higher class.Money was the determinant of getting stronger Constellations as they offered skills to those who paid more.Oliver had no problem with that as he was raised by his aunt who was a super rich woman.That woman could contract one of the Strongest Constellations.However, she suddenly offended the Constellation she was about to contract, causing an inevitable conflict.As a result, that Constellation used his influence to make all Constellations not accept contracts from the two of them.Even with a lot of money, their status was destined to plummet in this new era if they did not have a Constellation.They had to be prepared for the attacks of their enemies.Unexpectedly for Oliver, when he felt hopeless, he accidentally joined a chat group that he initially thought contained strange people but turned out to be the most powerful figures in the universe.Even two of them casually gave him SSS+ Class Skills...

Have you ever thought that the state of the world as it presently is, could revert to the laws of the ancients? When a series of strange incidents beginning with the disappearance of his friend led Luo Yuan to question the possibility of an apocalypse, he becomes embroiled in the midst of a global-scale chaos.