
Tsukasa Narumi is the shelf attendant at the Return Interview Room, knowing that answers defending Mio will deduct points from her.
Tsukasa tries to make Mio cut him off, but that is also his own way of protecting her.
Source stage
More discoveries

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

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.

Asagiri Mio is a reader caught up in the return procedures at the Kankendo, one who never misses the moment when kindness transforms into a contract.

Kokon Ren is a reader pursued by the accounts and ledgers of the Oukando, learning that the stronger the desire to return, the more easily one becomes someone else's price.