The Male Protagonist Tries His Best to Save the Female Protagonist: My Girlfriend Has a System

A strange nuclear explosion occurred all over the world. The moment the heroine saw the nuclear explosion, she got a system that could make wishes. The male protagonist got nothing and started to cultivate immortality by mistake. The two are separated because of this, but the heroine can always make a wish when the hero is in crisis. Tag: pure love, cultivating immortality, apocalypse, system