Kinokoinu: Season 1, Episode 7

1 - 7: Kinokoinu's Sibling

Turns out Plums is Kinokoinu's sibling formed from its spores. Plum lives with Anzu and her mom, Tsubaki. Tsubaki used to tease Hotaru in elementary school and is also a picture book author. Hotaru decides to get a cell phone after years of refusing.