It's been three days since returning from the "Mirror Hell," the third of the Seven Wonders.
To cheer up the listless Kou, Nene heads to the Tanabata Festival held at the border.
Hanako and Kou were enjoying the festival when they came to their senses and found themselves in a world 50 years ago.
The person I met there was the living Hanako――?! The 8th volume of the Seven Wonders of the Academy, where fates intersect!