i know this is the kind of seinen most people would find boring, and it's low budget, but as a realism and characters/psychology and drama enjoyer i would gladly watch a second season. execution can make or break a show, and personally i found the direction very good; even though i'm usually not a fan of action and find it boring, here i was captivated both during the action and the character moments. what pulled me in at the beginning was those character moments, more specifically the realistic way they're written, which is a crucial thing to me. this, plus character drama in general, tense action(rather than fun, over-the-top shounen-like action), and of course the entire concept of firefighting and the very wholesome and humane core of this show are what shine in it.
the visuals are on the low-budget side but as i mentioned previously the direction is good and made the tense moments captivating (to me at least!), which makes the visuals not really matter (lots of people loved higurashi despite the subpar visuals).

if it's not your thing after 2 episodes it's probably not for you.