All things are temporary. Never expect anything to be permanent. Enjoy the limited time you have together, for if we made decisions based on how long they were to last in perpetuity, we would make no decisions at all.
I like how the different lifespan is being lampshaded at the start by the Demon Queen saying that the slaver trouble was recent while Haru is already grown up.
Consent is not needed if there’s a relationship bonding them together. So you’re telling me it’s not rape if someone had a wife and sexually assaulted her? I see... learning new things everyday.