On her way to school one morning, a boy from another school gives Himeno a love letter. The sudden turn of events has Himeno bewildered, and behind her bewilderment likes a traumatic memory from her childhood. What happened in Himeno's past? Himeno and Nozomi have come to Kyoko's house for a study meeting. As they're working, something strange happens...
It's not like I'll ever use math if I don't 
want to be a doctor or something.
لن أحتاج الرياضيات بما أنّي
.لن أصبح دكتورة أو شيء من هذا القبيل
Mathe braucht man doch nur,
wenn man Wissenschaftler werden will, oder?
No es que vaya a usar matemáticas
si soy doctora o algo así.
No es que vaya a usar matemáticas
si soy doctora o algo así.
Je serai jamais scientifique,
je risque pas de me servir des maths.
La matematica non mi serve a nulla,
mica voglio diventare un dottore o robe simili.
Eu nem vou usar matemática na minha vida
se não quiser ser médica ou algo do tipo.
Математика всё равно не понадобится, 
если не соберусь врачом стать.