Ah! A family I've been helping, that I care for, and that has really helped me out!
And they're in trouble!
Well, fuck them; who cares.
That makes me cool, when I do a sudden 180°, and act like I don't give a shit about other people, right?
...
I'm not sure why pages 10-14 have him suddenly act like this, but something is fucking wrong with Japanese people in general, if this is the response in every single manga.
[EDIT]
Also, to be clear, it's also because he turns back to his normal, helpful self right afterwards, and for no apparent reason.
I just don't get it; why the sudden edgelord fuckoff attitude?