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...
But why...
...ولكن لماذا
Aber warum?
Pero ¿por qué…?
Pero ¿por qué…?
Mais pourquoi ?
Ma perché...
Mas por quê, então?
Но почему...