Let's rewind the time for a bit back when Aran has started to deal with his own crippling feelings after Paula's arrival and confrontation. Since he was not able to make some plans with the other including Nikki, he tried to go back to his own room but after sensing that there's someone waiting on the other side of the hall, he walked slowly to see who it is.
(Hmm?) It is evening. The sky is veiled in a dark coating of bluish linear force. The stars are twinkling and the moon appeared on top to rising. After receiving such a piece of important information, he lost all of his focuses. He didn't try to make up with the others and just like that, he was isolated for a short time.