In the library's anteroom, they find Natsuno's stalker Fujimaki Hotaru--her classmate Osawa Hami.
She and Kazuhito had once exchanged promises--that she would become an author and he would be her first reader. Having become an author, Hami returned to see Kazuhito. "Welcome home, Kazuhito-kun."
That must have been what bothered 
me when I read that book.
Jetzt weiß ich, was mich an dem Roman
so beschäftigt hat, weil er von dir ist.
Eso debió ser lo que me 
molestaba cuando leí tu libro.
Era isso que deve ter me incomodado 
enquanto lia este livro.