Sorry but I'm not going to side with you on that one Yuu. Rats and pests are better off dead.
Yes they are living being, but they aren't the kind which can coexist with us safely.
That was one heck of a misleading opening page. I think that girl needs to eat more. Her ribs should not be visible. This series is perfect at blending comedy, ecchi and Eldritch horror.
I'm so glad Yuu's got Chiyo with him. Only Satan knows what could've happened to him had he met those demon rats without her presence to ward them off...