Mirai Kara no Love Letter: Metsubou suru Sekai no Eiyuu wa Ore!?

A third-year student at an academy named Ian Ferkus receives a love letter dated seven years into the future. The letter addresses him as a hero and includes a warning that the world will end unless the future is safeguarded. Determined to understand the message, Ian works with his friends to uncover the nature of the future and how to prevent its destruction.