There Is a Ghost Seal in My Mind, Which Can Make Contracts with Ghosts and Gods

There is a ghost seal sealed on the back of the statement. It can make contracts with ghosts and gods, and it can also swallow emotions. Cannot be exposed. Otherwise, even forgetting is a luxury. The question is - God is dead and ghosts are everywhere. What can he, a recent graduate, do to hide? What's worse is that each of the ghosts he signed a contract with is more weird than the last.