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. 
The lady from back then was 
a much calmer, older woman!
!تلك الفتاة كانت امرأة أهدأ وأكبر سنّاً بكثير
Das Mädchen von damals
war viel sanfter und auch älter als sie!
Aquella mujer era mayor
y mucho más sosegada.
Aquella mujer era mayor
y mucho más sosegada.
Je me souviens d’une adolescente
qui était la douceur incarnée !
La ragazza di quella volta