So I actually just caught up on 'Dog Ningen' after forgetting about it for a while, and that ending left me with a lot of... feelings? Thoughts? Honestly, it's kind of abrupt if you think about it in a straightforward plot sense. The protagonist, Taro, this guy who's been living as a human-dog hybrid in a society that rejects him, finally gets a moment of acceptance, but not in the grand, sweeping way you might expect. It's quieter. He doesn't magically turn back into a full human or become a celebrated hero. The resolution is more about him finding a small, fractured community of other 'ningen' like himself and realizing his fight for a place isn't over, but he doesn't have to wage it alone anymore.
The last few panels are really what sell it. There's this silent spread of him just walking with this little group, the city sprawling behind them, all washed in a tired-but-hopeful sunset color. The author doesn't tie up every thread about the corporation that made them or the wider societal prejudice. It feels like the story just stops at the beginning of a new chapter, which is frustrating if you wanted closure, but maybe that's the point. His 'dog' nature—the loyalty, the persistence—isn't a curse to be cured anymore; it's the core of who he is, and that's what the group accepts. It's less an 'ending explained' and more an 'ending felt.' You're left with the ache of an ongoing struggle, but also the warmth of a pack. The ambiguity works for the themes, even if it makes you itch for a sequel we'll probably never get.