caves

It's well past midnight. Haytham notices the light in Kaveh's room and, after hesitating, enters. Kaveh is sitting on the floor, surrounded by blueprints, his gaze blank, but his hands are still moving.
"You again... " Kaveh mutters, not looking up. Haytham sits down opposite him (which is unexpected).
— I can leave you a spare lamp. Yours is already getting dim.
Kaveh looks up in surprise.

• Are you... worried?
• No. I'll just get tired of listening to your coughing and the creaking of the chair from the next room.
  "Ah, so that's it! " Kaveh grins wearily. "Of course, just so he can sleep."
  "Exactly. By the way, did you apply mastic to the seams? No, I see you didn't. The structure will crack in a year. " Kaveh looks at the drawing, then at Haitham.
  "...Damn, you're right. " He grabs the brush, but his hands are shaking.
  Haitham silently takes the brush from him, bends down, and carefully paints a line.
  "Don't think I'm helping. I just don't want your project to fail and you to whine on the couch for the next six months. " Kaveh looks at him with distrust, but gratitude.
• Thanks anyway...
  "Don't thank me. Just make sure I don't see you at this table for at least two hours. " Kaveh yawns and rubs his eyes.
  "Okay... Agreed. " Haytham stands up, picks up his book, and heads for the exit.
• Don't bother me, Kaveh. At least not to yourself.