I am definitely not getting teary eyed over that last page, I am not!
Other light novelists and mangaka? Look at this! There was no cute girl crying over being horribly wronged or tragic backstory.
Instead, here you have something very real, a concrete feeling of loss, a bittersweet wish of an aging man to get to choose his place to lie down and breathe his last. To then be allowed that very wish, and more than that, being shown genuine kindness, something they have no doubt been low on for quite some time.
This is how you do emotions.