@Balaji nope it's shown in the 1st 5 chapters ( I think ) he summoned the black ink and requested to know all the knowledge in that world ( earth ) and his wish was granted. But the price was the black ink ( probably the demon God ) opening the gates to the current world and getting sent here with blackie ( the name the MC gave to the black ink ) and doing blackie's bidding without the knowledge of the MC himself..