Tsukasa Narumi is the shelf attendant at the return counter, able to distinguish the sound of a white ticket stealing someone's return order.
Tsukasa wants to protect Mio, but he cannot bring himself to reveal that he knows the owner of the white ticket.
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.
