Deep Love: Pao no Monogatari

ＤｅｅｐＬｏｖｅ パオの物語

Being abandoned by his owners, having his mother die of starvation, a puppy who suffered lifelong separation from his siblings wandered around the city. Meeting and parting with kind people, experiencing brutal treatment from unjust people. Pao, who learned to live within the harshness of reality, awaits even more ordeals... (Source: MangaTraders)