It may be possible to have it delivered to a locker at a local 7-11. This is known as "Amazon Locker" https://www.amazon.com/b?ie=UTF8&node=6442600011
if they find it either
a) completely deny everything and mention that you ordered a different manga, and they shipped the wrong one
b) again, completely deny everything and say that its probably the neighbors, and put it in their mailbox but steal it back when your parents aren't looking
or
c) ¯_(ツ)_/¯ guess you'll die
Just bought a yaoi manga on amazon but cant be happy about it cus I'm terrified my parents will get it before I do ( ̄∇ ̄")