The Protagonists Are Murdered by Me - Chapter 65.1: The great principle of harem.

Three years ago, the animals and plants on Earth underwent crazy and unexplainable changes that included transformations, reversions, and the addition of otherworldly species. And it was the start of a brand-new type of profession in the new generation of humanity – Monster Trainers, people who specialized in taming monsters.

Year 2056, in a city in the Yuan Jiang Su Jin area. On top of a ruined, shattered six story residential apartment sits a teenager wearing a combat vest, militaristic trousers, and alloyed battle boots. On his back is a hexagonal shield and equipped is a blood-shadow battle knife. He sits there silently on the edge of the roof. At this time, the sparkling sky was shining and there was a refreshing breath within the air that blew towards him. However, there was only silence within the ruined, deserted city, with an occasional howl that makes your heart skip a beat.

Traversing to Naruto World on Monday, as long as you sign in, you can get the other party’s ninjutsu, ninja tools, and bloodline boundaries. After the good impression is full, there are all kinds of surprises!

Kai: Where did I go to this kid to learn Bamen Dunjia!

Obito: Damn, how can this kid be so powerful!

Nagato: Shinra Tianzheng! Are you interested in going to Konoha for a double yellow bullet?

Hashima: Come on boy! Thousands of hands beat each other!

At this time, Monday stood in front of Kaguya Otsutsuki with a charming smile.

Kaguya will sign for me.

- Description from novelbuddy

First World : CampioneCurrent - Second World: High School DxDThird World: ???Reincarnated into the world of Campione! Haru Kasugano, our hero slays gods and ascends as the mightiest Godslayer. He battles powerful God-Kings and Campiones, claiming victory after victory. Whatever it is. [Wealth, Power, Beauty] he has it All. Watch him grow stronger as he travels into new realms like High School DxD and the Fateverse, leaving a trail of defeated gods and captivated hearts in his wake.