It look great, I like the atmosphere you managed to give to the whole.
To me it have the vibe of either a survival horror game, not long after the catastrophe (maybe few weeks or a month after) while the survivor make the trains or metro a little shelter to gather supplies and rest before continuing their road. In these setting, there is still power and electricity running there and here but not for long.

The scond vibe it give, is for me a tramway making a halt at an underground station or your characters spend the whole night out and they get back home with the early tramway and the sun is slwoly raising.

I love your traditional works Zu. c:

thank you very much! a very warm description. But in fact, these characters are returning from work. I have a comic, but it has not been translated into English. For now, I'm just posting my work here :3