When Tsubasa hands a strange note to Arisa, a note she found in her sister's shoe locker, Arisa mentions something about Tsubasa not knowing her secret and her class' secret.
Arisa mentions something about Tsubasa not knowing her secret. Arisa mentions something about Tsubasa not knowing her class'secret. Tsubasa hands a strange note to Arisa. Arisa is a note. She found a note in her sister's shoe locker.