Baka to Test to Shoukanjuu‎ - Volume 1, The Fifth Question

“Who knew the key to surviving a deadly island was... well, charm? Guess I’ve got a superpower after all.” – Lucas Carter.When a school field trip takes a disastrous turn, Lucas Carter and his classmates find themselves stranded on a remote, uncharted island. With no rescue in sight and the wilds teeming with danger, survival becomes a brutal challenge. But when Lucas awakens the Harem Survival System, everything changes.The system is as bizarre as it is powerful: for every woman Lucas seduces, he gains extraordinary survival skills and critical resources.From hunting and crafting to strategic foresight, each intimate connection gives him the tools to outwit the island’s many threats.As Lucas grows stronger and more capable, the dynamics among his classmates shift.Friendships turn into alliances, jealousy brews in the shadows, and the boundaries between survival and desire blur.Meanwhile, the island itself hides secrets far more dangerous than its untamed wilderness.

Heaven favors the strong and wealthy.Hex realized that the day he was thrown out of the cloister and into the slums. He vowed to become the baron and show what being strong meant.To forge his own destiny, Hex scavenged the mountains, braving the cold solitude with a smile. At last, one day, he gained his chance on the verge of life and death. Even then, society and Fate tried to interfere. Faced with death, his Will didn’t waver and he gritted through, forcing his Heart to awaken. The Stone Heart in his chest defied his destiny and helped him write his own.Emboldened by his Heart of Stone, he walked the path to his dreams. His dreams, however, threatened to put him in the middle of the crossfire between Powers that could destroy Earth and Sky. Hex couldn’t allow his dreams to shatter. So, he sought to destroy all those who threatened his dreams.Follow a young man on his quest to fulfill his dreams, even if it meant to destroy Heaven and Earth.

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Reborn in the world of Naruto as the Nine Tails, he finds himself sealed within Uzumaki Kushina. No longer just a mindless beast, he possesses his own will, intelligence, and the power to change the fate of the tailed beasts.Madara : I never thought that my Rinnegan would be crushed by Nine Tails.Hashirama: Times have changed. I once controlled the Nine Tails, and now the Nine Tails controls me.Uchiha Mikoto: Kushina, I didn’t expect you to have something this powerful sealed inside you.Uzumaki Kushina: Each of the Nine Tails' tails gives me a different feeling.At this moment, the Nine Tails stood tall, representing all the tailed beasts.“Tailed beasts will never be slaves!”