Last Trick ~Saigo no Sakuryaku~

Main character lost belief in God together with his mother's death. At the same time a new person appeared in his life - Sphere. He calls himself a God who only needs a final license. He urges protagonist to make a wish. As incidents start to happen around protagonist, Sphere only laughs casually. What's left to protagonist. Only pray and make a wish. And his wish is...

[From vndbreview]