God is in charge of telling Kanade how to break his curse. Initially, Kanade didn't believe he was truly a god but after the latter turned him into a girl and threatened to erase the porn folder Kanade had (even knowing the folder's name), this changed his opinion. Kanade has questioned him over how to break the curse but doesn't receive any new information and is annoyed by the deity's upbeat nature.
In their first call, Kanade put his number under the name of "Flippant" since he wouldn't answer him properly. God on the other hand seems to enjoy joking with Kanade and sometimes gets serious enough to tell Kanade about his curse.