Whisper of the Heart(1989)

Mimi wo Sumaseba

It's August, during summer vacation. Where did Shizuku, a middle schooler who loves books, end up after being led by a mysterious cat...? An encounter with an intriguing boy, her future dreams, and feelings she's experiencing for the very first time... Something begins to change inside Shizuku. This is a fantastical story that was also adapted into an anime by Studio Ghibli.

(Source: MANGA MILLION)