Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 3Book 1: -2: Two Promises

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

Just became the disciple with the highest seniority, but the Age of the Dark Mist descended, and the sect plummeted into a land plagued with raging demons.

Shen Changge who had already written his suicide note suddenly awakened to a Check-in System.

[Check-in at Sword Lord Statue, Success, acquired: Empyrean Sword Manual]

[Check-in at Training Ground, Success, acquired: Cultivation Base*50 years]

[Check-in at Sword Clout Mountain, Success, acquired: Sword Clout of Destruction*1s]

…

In the Age of the Dark Mist, demons were rampant, and an impenetrable mist veiled the empyrean. By vanquishing demons, the mist could be dispelled, and new check-in locations could be unlocked. By doing so clandestinely, Shen Changge became a Sword Saint.

When a demon broke into the Empyrean Sword Sect, everyone in the sect was powerless. People were in despair, until they met that young man in white who had just checked in at the Empyrean Peak. The young man’s eyes were ablaze.

“Submit, demon.”

Chen Ye transmigrates over and unexpectedly became a figure in a dark Xianxia game.He is a mere Medicinal Farmer, yet he has two disciples, who will be two legendary Fairies.The first disciple, Lu Zhiwei, is the foremost Righteous Fairy in the world.The second disciple, Xu Qingjun, is an evil-doing demon path enchantress.However, looking at the two shivering little girls curled up into a ball, Chen Ye realizes that he transmigrates five hundred years earlier.And unfortunately, the former owner of the body seems a harsh master to them so that the tea served by Xu has been poisoned.“This tea...”“It's too bitter, I won't drink it.”

There was a time when I used to think, “How nice would it be if I got transported into a novel world?”Yeah, I know, it sounds childish—but who cares?It was just a passing thought. I never imagined those silly wishes would actually come true.And yet, I opened my eyes to find myself possessed by the villain of a romance fantasy novel.Not just fantasy—romance fantasy.The worst part? I wasn’t even the main villain, just a stepping stone for the female protagonist… who also happened to be my fiancée.Thankfully, the engagement was broken off, and I thought I could fade into the background as a mob character, ruined by the plot.…But for some reason, the female lead won’t let me go.