Toaru Majutsu no Index: Genesis Testament - Volume 3, Chapter 3: Academy City’s Greatest Taboo — Safety_Zero, Control_Free.

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

Cosplayer Liu Mang accidentally crosses through time and arrived at the Eastern Han Dynasty wearing Aries Gold Cloth. (Saint Seiya!) He arrived on top of the walls of XiaPi right when it was about to fall to Cao Cao.

Junno is thrown into a fantasy world with starter equipment, a sword, and a bag of assorted coins. He decides to become an adventurer and earn money. Upon receiving his status plate, it appears that he has the divine blessing of many gods. Then he chances upon a s*ave.

Haruki arrives in the Naruto world and before he could take a breather, a ninja, holding a sharp blade, rushes towards him.“…”He closed his eyes and prepared for a second transmigration.Unexpectedly, a pair of huge claws stretched out from behind him and twisted the ninja in front of him.“Yuta...”“Don't hurt Yuta...”Haruki opened his eyes and saw a face that was extremely terrifying.Isn't this the Queen of Curses Rika from Jujutsu Kaisen?…[Congratulations to the host for successfully calming down the companion cursed spirit who was in a rage—Rika Orimoto!][The Cursed Spirit Mother Auxiliary System has been successfully activated!][The King of Curses Ryomen Sukuna... Waiting to be activated! ][Host Identity Template——Yuta Okkotsu][Please activate Yuta Okkotsu's main ability!]