 If you liked
Ajin
|
 ...then you might like
Banana Fish
|
Dark atmosphere of the world, both series composed by Hiroshi Seko. Biggest thing they have in common is showing how few can control the many. Big corporations are testing new species whilst public knows nothing about it or are forced to thing that it's helpful and nice for ajin too. In Banana Fish it's the mafia ordering everyone around, getting people in important government positions do what ever mafia wants and public are left in the dark. Sort of soft disclosure.