HELLO WORLD: The Manga

Living an average life, Naomi is an introverted adolescent until an enigmatic figure, who happens to be Naomi from ten years ahead, emerges unexpectedly. Future Naomi emerges with a warning of grave potential consequences: Naomi's girlfriend-to-be Ruri will be involved in a catastrophic accident shortly after they commence dating. Will the past be altered to shape a brighter future, or does Naomi's mission extend beyond saving one person's life?