Synopsis

Hatsuki is a highschool student living with her sister, Hatsumi, who she has a huge crush on. On Hatsumi's 16th birthday, she is suddenly surrounded by a green light and disappears in front of Hatsuki. She manages to follow Hatsumi with the help of a being resembling a fat baby chick (literally), ending up in a place called "The Great Library", which is full of different worlds stored in books. Hatsumi wasn't there, though, so the search for Hatsuki's great love begins and involves traveling from book to book. (Source: AniDB)

Characters

Hazuki Azuma

Quiet, strong, and fiercely loyal, Hazuki is protective of Hatsumi, hiding her vulnerability behind a cold exterior.

Noto Mamiko

Hatsumi Azuma

Hatsumi, Hazuki's shy, shorter sister and love interest, mysteriously vanishes on her 16th birthday, revealing a hidden identity as a previous library guardian.

Shimizu Ai