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...
Then why?
إذًا لماذا؟
Was aber?
Entonces, ¿por qué?
Entonces, ¿por qué?
Mais quoi ?
E allora perché?
Então por quê?
Тогда в чём дело?