Setting : The staff lounge.

Me : I noticed that you look rather sad lately. Is everything all right?
Bn : *looked very distant. What me? No.

I decided not to let it go
Me : I saw you walking towards the gate sometime last week. You looked so tired.
He hesitated for a moment.

Bn : I just got back from my one month MC.
I didn't hide my shock.
Me : One month? What happened?

That was when I found out his troubles. I inquired if the medical expenses are still bearable, but he seemed reluctant to talk about it.
But I'm glad that he has a brother who cares.