Ai no Kusabi (2012)

Ai no Kusabi is set in a future where the planet Amoi is governed by the supercomputer Jupiter. The planet's population is predominantly male, with a strict social hierarchy that divides people into light-haired elite and dark-haired "mongrels," with the former being allowed to keep the latter as temporary pets. Iason, an elite member, meets a mongrel named Riki in the slums, but their initial arrangement evolves into something more complex as Iason keeps Riki beyond the socially accepted timeframe.