Was Natsuki's first love, Atri? His beautiful childhood memories are gradually being overwritten. Despite his unwillingness to admit it was her the facts around him are lining up to force him to, but he continues to deny it. 
It's no use. She's been overwritten.
لا جدوى. تمّ تعديلها
Verdammt! Jetzt hab ich
sie überschrieben!
Rayos, me sustituyó el recuerdo.
Me ha sustituido el recuerdo.
Misère. Mes souvenirs s’altèrent.
Maledizione.
Droga!
Вот чёрт. Воспоминания изменились.