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. 
Why are you bringing that up?
لماذا تذكرين هذا؟
Woher weißt du das?
¿Cómo lo sabes?
¿Cómo lo sabes?
Qui t’a parlé de ça ?
Perché me lo chiedi?
Como você sabe disso?
С чего вы взяли?