Ruru was left along with Akari in the human realm, he doesn't have any choice because Latrice has decided to leave him in that place.
"Are you alright, Mister?" As Akari tried to open up a conversation with Ruru, Ruru suddenly glared at her. Unpleasant from what he heard, Ruru doesn't appear to be interested in the girl at all.
"Akari, it'll be better if you stay away from him. And your little ghost, aren't you being rude right now? Don't fling to us your frustration. That is a bad habit." Laize suddenly smirked when he saw a light on Ruru's back.
"And if you are planning on doing something absurd, think about it once again. You were bound here so it'll be really useless." After that, Akari and Laize went somewhere. Leaving Ruru at the rooftop where Latrice departed.