Honestly I hope this manga keeps going, there's actually a bit of time progression and character development, and the author seems quite grounded and level-headed so I'd be really interested in watching these characters grow up and tackle college/wherever they go in their lives.
Damn, that perfectly showcased Japan's aging problem from a working man's perspective (https://en.wikipedia.org/wiki/Aging_of_Japan#Fatigue_and_overworked)