>>32912865Depends on what country you live in. In the United States, writings and drawings that describe/depict sexual acts involving minors are considered to not be child porn as long as they have some legitimate sort of literary, artistic, scientific, historical or other societal value.
However, people still do go to jail from time to time in the U.S. for distributing/transmitting/obtaining lolicon, shotacon and other works involving sexual acts with minors. That's because some prosecutors deem them to violate federal obscenity laws. However, it's actually a legal gray area, as the courts have not yet rendered a verdict on how wide the scope of obscenity law is. Typically, defendants will plead guilty to a lesser offense to avoid risking a longer jail sentence from having a court rule the federal obscenity statute does capture works featuring sexual acts with minors.
Instances like that are rare, though. You typically would need to be doing something really boneheaded for any federal prosecutor to want to pursue a case like that against you. From what I've heard, people who were brought up on obscenity charges also reportedly had other legally non-kosher stuff on their computers too besides hentai/lewd manga.
Basically, 99.999% of Americans who have hentai won't need to worry, but there still is a non-zero risk where you could get prosecuted, under a statute with a highly murky scope that hasn't yet to be fully clarified by the nation's highest courts.