Yumi is born in a state of unconsciousness after her mother dies in a train accident, and she continues to exist in this condition. On her 17th day, she suddenly awakens after being kissed by Yuichi, a boy who has been observing her since childhood. Upon regaining consciousness, Yumi resembles an infant, but she experiences rapid intellectual growth each day. However, on the third day, Yumi informs Yuichi that she can only remain conscious for five days.
Serialized on Weekly Shonen Sunday 1971/02/21, Shogakukan
The title, “The Glass Brain,” is unique enough to attract readers, making them curious about the story and prompting them to pick up the book. The narrative is essentially a simple love story about a heroine suffering from a terminal illness. However, the setting surrounding the heroine, Yumi, makes the story mystical.