The Day I Became a God (2020)

As Youta Narukami gears up for university entrance exams during his final summer vacation, his life takes an unexpected turn when Hina, a young girl declaring herself the "god of omniscience," appears before him. Initially skeptical, Youta struggles to accept her shocking prediction that the world will end in thirty days. However, as he witnesses Hina's uncanny abilities, his disbelief fades. With her innocent demeanor and mysterious motives, Hina chooses to stay with Youta, leading to a summer filled with adventure and existential reflection as they confront the impending doom.