MTL - The Trainer’s Surname is Uchiha - Chapter 309 spot

A 13-year-old deaf teenager living in the 21st century suddenly found himself as a young boy in Japan during the early 1900s. With two World Wars, two nuclear bombs, Hitler and many other disasters awaiting his future, he thought things couldn't get worse.Except it did.He found out later on that he had actually reincarnated into the world of Demon Slayer where man-eating demons ruled the night. He thought things couldn't get worse.Except it did.But hey! At least he had unparalleled talent, incredibly special eyes and future knowledge.How will the story of Demon Slayer change with the addition of this unique character? Will so many still die if the Hashiras had one more pillar in the final battle?Or will the story end on a much happier note?

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

At dawn.The light of dawn lingered, hesitant to arrive, while the remnants of the setting sun had long faded into darkness. Within the city shrouded in thin mist, the hidden churches in the shadows, veins clinging to the cracks in walls, the gnawing sounds echoing from the sewers, and the murmuring shadows...A lantern bearer strolled forward.

The little white fox Xueli, by chance, picked up Zilan, the young master of the Tian Lang clan in the nine layers of heaven, who accidentally fell into the fairyland. Because of the language barrier, the two had a series of ridiculous stories, but in the end they fell in love with each other. A warm and sweet fairy tale, the love story between the big furball Zilan and the little furball Xueli, combined with the background of myths and legends, constructs a lively and cute fantasy story.

Xueli is a carefree little white fox in the forest, until a big snow wolf falls from the sky one day. The wolf was seriously injured and he couldn’t speak the language of the forest. Xueli went over to take a look curiously, and brought him some food, but the other party followed her. Such a big wolf followed her all day, looked at her, licked her, and forcibly wrapped her in his fur! Xueli was frightened to death, kicked him desperately, slapped him, yelled to go away, but the difference in size was too big, it was useless, waahh…

Because of the failure of the tribulation, Zilan was forced to transform into the original body of the divine beast, and fell into a small fairyland that was isolated from the world and could not understand the language. However, he did not expect to see the legendary Nine Tail Fox that had disappeared for thousands of years here. The little fox is lively, kind and cute, and he likes her very much. She not only walked around him worriedly, but also brought him fruits to eat and found herbs to heal his injuries. Zilan was deeply moved and decided to reciprocate by acting as a bodyguard for her and keeping her warm at night. He decided to bring the little nine-tailed fox back to the upper fairyland, marry her as his wife, and announce to everyone that she is the love of his life and the treasure of this world.

- Description from Novelupdates