I'm definitely no expert, but I would say that is almost certainly a hybrid Corn/Milk. Not sure on the parentage, but it doesn't look full Corn snake to me. If I'm not mistaken (and I could very well be, anyone feel free to correct me...) these type of hybrids are called Jungle Corns. Whatever it is, it is very lovely and a great pickup. The colors are coming out nicely. Congrats!