Zein had realized something about Bassena; the man wouldn't sleep if he was extremely stressed or extremely happy. The former was because he only dreamt about a sea of darkness when he was stressed, and the latter was because he didn't want the happiness to be disturbed.
Between the two, it was easy to recognize by how he positioned himself in the morning; either curling up by Zein's side, or pressing his face on Zein's neck.
That morning, Zein woke up with Bassena's warm lips on the back of his neck.
How weird; he thought the esper would sulk since all they did yesterday was eat, sunbathe, take a nap, explore the bunker and hidden passage, and then watch movies until Zein fell asleep. A peaceful, uneventful day. So peaceful that for the first time after months, he could sleep early without any care.