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...
Do you understand why we're having 
a study party on a Sunday?
أتعرفين لمَ نقيم تجمّع
دراسة في يوم الأحد؟
Du hast doch nicht vergessen, warum wir
den Sonntag fürs Lernen opfern, oder?
¿Entiendes por qué
estudiamos en domingo?
¿Entiendes por qué
estudiamos en domingo?
Tu sais pourquoi
on révise un dimanche, j’espère ?
Lo capisci perché ci siamo incontrate
per studiare di domenica?
Você entende por que estamos fazendo
um grupo de estudos num domingo?
Ты понимаешь, 
почему мы занимаемся в воскресенье?