Toaru Kagaku no Railgun SS - Volume 2, Chapter 8

Aaron, a wildlife biologist, became a military strategist right after a global war between nations began.He never wanted to participate in the war but he had to, because he wanted to continue his studies on endangered species the moment the war was over, but to his surprise, everyone in his unit were killed, including him, and the next thing he knew, Aaron woke up in the body of a young noble having a similar name to his.However, he also noticed he had awoken in a world different from Earth.In this world, demonic beasts ran rampart with only one thought in mind, causing them to feed on anyone they see, be it humans, elves or even magical beasts as well.During his first encounter with a magical beast, Aaron awakened a system which allowed him to bond with magical beasts and to obtain terrifying abilities from these bloodcurdling magical beasts, so he used his experience as a wildlife biologist to help make it easier for him to bond with these beasts.However, Aaron also noticed he could evolve these beasts if their loyalty towards him had reached a certain level, so he vowed in his heart to grow strong enough to protect those he cared about in this world with the hope of living a happy, peaceful life where he'll be able to focus fully on his passion as a wildlife biologist.

Ruan Yingyin is a silver hamster who inexplicably transmigrated into the novel 《After the rebirth of the villain》she had read.

The villain Jiang Xingyuan had a girlfriend named Ruan Yingyin in his previous life, but Ruan Yingyin later betrayed him, causing Jiang Xingyuan to go bankrupt, and finally ran away with money.

Jiang Xingyuan’s ending in the novel was miserable. He regressed back to high school and retaliated against Ruan Yingyin. Ruan Yingyin’s ending was much more miserable than Jiang Xing Yuan.

After remembering everything, Ruan Yingyin: As a silver hamster essence who transmigrated into the book, I just want to concentrate on studies. QAQ

Ruan Yingyin felt that she had to study hard to catch up with her classmates. But when the results came out, she was the first.

Ruan Yingyin felt that she could not sprint, but when she ran, she crossed the finish line first.

Ruan Yingyin felt that she wasn’t good at singing. As a result, at the school party, a small video of her singing was posted on the Internet, instantly gaining countless fans. Even people from the recording company came to invite her to debut as an idol…

The villain who bullied her at first, he stepped on her chocolate, kicked her stool, and forced her to eat mustard, finally, hugged her tightly in his arms and whispered to her, “baby, help me…”

- Description from Novelupdates

Meet Sora and Shiro, a brother and sister who are loser shut-ins by normal standards. But these siblings don’t play by the rules of the “crappy game” that is average society. In the world of gaming, this genius pair reigns supreme, their invincible avatar so famous that it’s the stuff of urban legend. So when a young boy calling himself God summons the siblings to a fantastic alternate world where war is forbidden and all conflicts–even those involving national borders–are decided by the outcome of games, Sora and Shiro have pretty much hit the jackpot. But they soon learn that in this world, humanity, cornered and outnumbered by other species, survives within the confines of one city. Will Sora and Shiro, two failures at life, turn out to be the saviors of mankind? Let the games begin…

As the number one pill alchemist of the immortal world, Mu Chen had always believed that it was because he had single-mindedly focused on concocting pills that led to him to neglect disciplining his disciple. Which in turn, caused his disciple to be led astray by the seduction of devil cultivation, leading to the three realms to fall to disaster. After his rebirth, Mu Chen resolved to properly teach his disciple, give him the very best resources, earnestly love him, carry him close to his heart, teach him by way of example, and didn’t let him grow corrupt.