Hunter Academy: Revenge of the Weakest - Chapter 31 8.2 - Art Manual

Zheng Tan somehow returns to the year 2003, turning into a black cat. Picked up from a rubbish heap by the Jiao family, he is given the name “Charcoal”, and so begins the life inside Professor Jiao’s family. Zheng Tan remembers that he was once a person, but currently his body is that of a cat. He has no way of speaking the human language, but can understand it, and even retains the thinking and IQ of a young 20 year old youth. Read along as he adapts to this new world, and somehow tumbles from a group brawl to catching a thief.

- Description from Novelupdates

Jack transmigrated to a parallel world and locked on to a Judge System that provided rewards for punishing evil. Hence, an Adjudicator of Death who stood above the law was hence born.

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates

Chen Xi looks at the soldier who just threw a rock weighing a few hundred kilograms away and looks at the sky speechlessly. Is this really the late Eastern Han Dynasty?It doesn't make sense to see Lu Bu single-handedly cut through the ten-thousand-strong cavalry.Zhao Zilong ends up truly possessed by a dragon soul. Is he really human?Dian Wei single-handedly defends Cao Cao as they storm out of the enemy camp and slaughters a few thousand cavalry of the enemy. His combat strength is off the charts!Is there something wrong? Chen Xi touches a goose feather fan and fans it. A strong gale blows and he sighs.“This must be some mythical story, right? Even I'm not normal anymore.”