Jikuu Mahou de Isekai to Chikyuu wo Ittarikitari - Chapter 399 - Yellow area

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

Returning to the Mysterious Era features a boy who can time-travel back to the past using old relics. The twist? He’s stuck in the body of the relic’s owner.After a near-death experience, Cassius unlocks his ability to travel to the past in the body of Li Wei, a member of the Wind Elephant Sect. Li Wei was a coward who lived a life of regrets up until the day the entire Wind Elephant Sect was mu*dered. As Cassius relives Li Wei’s past, he makes different decisions to show Li Wei a different kind of future.By living out the ups and downs of Li Wei’s life, Cassius is introduced to the world of Covert Martial Arts, ties that run closer than blood, and supernatural forces. Crossing the line between the ordinary and supernatural, he realizes there’s no way back. New friends and enemies slowly integrate into his reality.Now, he must uncover the secrets of Covert Martial Arts and get stronger to survive.

Shuu is a member of the literary club that can’t write. One day, he gets a mysterious message on his phone from a girl called Eina, and from that impulsive contact, they begin to exchange messages. They talk of things like their shared interest in novels and grow close. However, when they try and meet, they discover a shocking truth. Eina lives… not in the present, but five years in the past! How will their love develop, parted by five years of nights…!?

Song Lianhe transmigrated into a book, becoming the Villainess and legitimate daughter of the General Mansion, the Crown Prince's fiancée, and the female lead's stepping stone. Her existence was to use her ignorance and foolishness to highlight the female lead's intelligence and kindness; her repeated unrequited love also drove her completely insane, and in the end, she was tormented to death by the male and female leads working together...Song Lianhe transmigrated at the critical moment when the Villainess tried to drug the female lead, only for the plan to be cleverly thwarted by the female lead, resulting in the Villainess losing her own virginity instead.In a dilapidated temple, while “saving herself,” she said to the paralyzed man: “Don't worry, I will take responsibility for you...”Afterwards, the woman picked up her skirt and fled. The villain opened his eyes, his gaze filled with a cold and sinister venom: “I want her dead!”