Steins;Gate (2011)

S1E13 Metaphysics Necrosis

Haunted by the memory of a tragedy he's already witnessed, Okabe steels himself for one last, reckless Time Leap. With his oldest and dearest friend's life hanging in the balance, he's willing to gamble everything—even his own sanity—to change fate. Can he rewrite the past before the clock runs out, or will his desperate jump only seal their doom?