Naruto: I'm Nine-Tails and My Host is Kushina - Chapter 145

Sam crosses to a new planet that is completely magical. He discovers that humans can have superpowers, and monsters also inhabit the planet. Humans continuously fight these monsters to protect themselves and their world.Unfortunately, Sam, who just arrived on the planet, lacks the potential to become powerful and doesn't possess any shortcuts to gain strength quickly. As a result, he resigns himself to living an average life and tries to avoid danger.However, everything changes when he graduates from the academy. He receives an invitation from his former academy to become a teacher, and simultaneously, he awakens the Teacher system.Now, on this perilous planet, if he desires to become powerful, he must accept students and empower them. Only when his students become strong will he gain strength himself. Join his journey to become the greatest teacher.

“One accidental signature, and now the legendary Shadow Queen is living in my house... wearing my T-shirts and refusing to leave! She claims to be cursed with laziness, but why did I just witness her destroy a monster with one finger? And why does she keep looking at me like I’m her next target? Someone help—I’m not ready for this kind of responsibility!”

There came a sudden ravage by monstrous creatures in a civilian world, leaving humanity's hope to lurk in shadows. Hunters, trained in special schools, wield potential and abilities that enabled them keep the beasts at bay.For Buji, life’s difficulties stem not from being an orphan, but from relentless bullying. Nicknamed “the weakling,” he detests the label but bears it forcefully since he could do nothing.When he transfers to a new school to join his foster sister, Buji thought things would be different. But, during the Awakening Ceremony of the school, he find out a shocking truth: he's was going to be an S-Rank hunter without a talent.Awakening no talent only added more difficulty to his life struggle as he was branded an outcast.On the verge of death during his first raid, Buji awakens an enigmatic system.[Host Found][Survival due to inheritance][Congrats, you have gained the status of a 'player'.][The player, upon leveling up will awaken a potent monster][Class: Animagus | Type: Snake | Aspect: Venom][Do you accept?]Given the choice to embrace a monstrous path, Buji seizes it with unyielding resolve.'If becoming a monster is my only path to strength, I’ll take it—and the world will regret casting me aside. Fighting against these hunters was going to be a job, but imagine a world where I had control over monsters, had my own monster kingdom, and becoming the strongest of all. Stepping on these hunters won’t be a deal anyway.'“Yes!”

A story about a traveler who crossed into a parallel universe, relying on his Proficiency ability to continuously grind experience and become stronger.