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...
(mangatraders.com)

Ayu, a 17-year-old high school student, believes neither in a future nor the happiness it could bring her. By selling herself, she tries to justify her existence, which is as bleak as her heart - it’s devoid of joy, sorrow, love. Not until her encounter with a kind-hearted old lady does Ayu begin to realize the true meaning of happiness…

This is the continuation of Deep Love: Ayu no Monogatari. Now that Ayu's gone, Yoshiyuki has lost everything. After his heart surgery, he has nowhere to go...except underground. This is the story of his work as a host.