
Tsukasa Narumi is the rain-shelf attendant at the bookstore, fearing why the future Mio hid the final line.
Tsukasa feels the future handwriting of Mio is genuine, but fears that revealing his name as a shelf attendant will distort her judgment.
More discoveries

Ayase Akari knows the reason why the red thread is being reattached to her unreturned book.

Even if Ayase Shou realizes that the light of the Night Lantern is fueling her tomorrow, she cannot erase the path home for Ren.

Ayase Shou is the mage who knows the accounts shelf of Okankoudo, hiding the fact that her own time was used for Ren's receipt.

Ayase Shou discerns the sealing threads of the Fox Bell and knows that the more Ren chases the nostalgic voice, the more her own voice fades.