One Piece: God of Space - Chapter 499 Ancient weapons appear

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

The fiancée has betrayed, but how could she know that the man she looked down upon was in fact a prodigy with healing and martial prowess!

Lu Liangwei wakes up to find herself transmigrated as a supporting character in the novel she had been reading a few days ago. According to the novel, this character has everything—beauty, wealth, status—except brains. Before Liangwei had taken over, she even went as far as to hang herself for the male protagonist that she loved: the Crown Prince as well as her sister's lover. Now that she has become a "brand new" person, it is time for her to turn her life around with charm and wit! She will get everyone to fall in love with her, even the Crown Prince's uncle—the Emperor! Who needs a prince when you can become the Empress herself?

When Fang Zheng opened his eyes, he was surprised to find himself reborn in a fantasy world of magic, dragons, knights, and princesses. Not only that, but even the game system that Fang Zheng had designed before also followed him into this world. Then, his next step would be to traverse thousands of plains, gain endless strength, become a brave hero, defeat the devil, marry the princess, reach the apex in life… wait, wait, wait, before all that, why was he reborn as someone who everyone called a cultist?