Bon Hyakusensai: Jinrui no Jumyou wa Takadaka 100-nen desu ga Kikai no Watashi wa 1000-nen Ikirareru node Anata ga Inakunattemo Kono Basho de Hitori Ikiteikimasu kara Goshinpainaku

Androids and bonsai trees have one thing in common: they'll both outlast a human's lifespan. Kanna, an android, received lessons from the "Sensei" who ran the bonsai shop, Kifu Garden. As "Sensei" regaled her with the wonders of bonsai, Kanna would watch with eyes full of curiosity...

A long time has passed since then, and Kanna is the only one remaining at Kifu Garden, when someone new comes to visit... A completely new human drama woven by the long lives of an android and bonsai trees.

(Source: Kodansha, translated)