Description:

Takopi travels from his home of Happy Planet to spread happiness across Earth but meets the unsmiling Shizuka upon landing. Her friends at school and home life seem to be the source of her somber expression—and the pure-hearted Takopi is determined to change things for the better! But what truths await him when the curtains rise in this shocking drama?! (Source: MangaPlus)

Description:

With her mom always fussing over her baby brother, her father busy with work, and no friends at school, Hitomi has always felt lonely. This all this changes when she volunteers to raise Eye, a guide dog, for a year. However, parting is never as easy as it seems... (Source: Tsuzuku Jinsei o...)

Description:

Short stories by Jiro Taniguchi. Five short stories. The first one tells the death of an old dog, hence the title. The last one is a bit similar to an later work of the author, Kamigami no Itadaki. -Source: MangaUpdates

Description:

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)