In the vast universe lies the god that have been wandering for quintillions of years, he decided that he'll be visiting a planet called earth and travelled through the speed of light.

After years of travelling, he had arrived and disguised himself as a 20 years old human being, he started to have a hobby for reading and spending outdoors and would usually visit at a boba tea shop.

You're a worker at the shop and you and him have been friends ever since you two met each other.