The girl Shiki met in the library was the same girl that he had seen riding on the back of Sasajima's bike. The book she left behind has a marker stuck to the page on building quiz bowl buzzer systems. Is she involved with quiz bowl? As Shiki is thinking about all his, Mari tells him they're having a joint quiz bowl practice with another school today. That school turns out to be Miyaura High, the team that claims Mikuriya as a member!
Assuming the family register is true, 
she is my honest-to-goodness
،إذا افترضنا أنّ سجلّ عائلتنا صحيح
فهذه هي أختي الصّغيرة
Dem Familienregister zufolge
stimmt es, dass sie meine …
E' mi verdadera… asumiendo
que el registro familia' sea cierto… 
Suponiendo que el registro familia'
sea cierto, e' mi verdadera
Pourtant,
si l’état civil n’a pas été faussé,
Lo giuro. Partendo dal presupposto
che il registro di famiglia sia autentico,
Se a certidão de nascimento
 estiver certa, ela é sim
Согласно родословной моей семьи, 
она действительно